diff --git a/Assets/Scripts/GenerateDemoFiles.cs b/Assets/Scripts/GenerateDemoFiles.cs
index 51593afae6adba0d74bd2a98cc7cdfe58de00084..3637e3c9d7938c5e9be7e8f9fe9114e6c5580576 100644
--- a/Assets/Scripts/GenerateDemoFiles.cs
+++ b/Assets/Scripts/GenerateDemoFiles.cs
@@ -475,16 +475,19 @@ public static void GenerateCanonBallStage3D()
         StageStatic.stage.solution.ExposedSolutionFacts.Add(BounceURI);
 
         List<QuadFact> Walls = new();
+        List<TriangleFact> Trieangles = new();
         for (int i = 0; i < Wall_parameter.GetLength(0); i++)
         {
-            Vector3 tmpVec = Vector3.zero;
+            Vector3[] corners = new Vector3[4];
             string[] edge = new string[4];
 
             for (int j = 0; j < Wall_parameter.GetLength(1); j++)
             {
+                Vector3 tmpVec = Vector3.zero;
                 tmpVec[dim_A] = Wall_parameter[i, j, 0];
                 tmpVec[dim_B] = Wall_parameter[i, j, 1];
                 tmpVec[dim_G] = Wall_parameter[i, j, 2];
+                corners[j] = tmpVec;
 
                 PointFact edge_point = new(tmpVec, Vector3.up, StageStatic.stage.solution);
                 edge[j] = StageStatic.stage.solution.Add(edge_point, out _, false, null, null);
@@ -494,15 +497,25 @@ public static void GenerateCanonBallStage3D()
             string quadURI = StageStatic.stage.solution.Add(topology, out _, true, null, null);
             StageStatic.stage.solution.ExposedSolutionFacts.Add(quadURI);
 
+            TriangleFact top0 = new(new[] { corners[0], corners[1], corners[2] }, StageStatic.stage.solution);
+            string top0URI = StageStatic.stage.solution.Add(top0, out _, true, null, null);
+            StageStatic.stage.solution.ExposedSolutionFacts.Add(top0URI);
+
+            TriangleFact top1 = new(new[] { corners[2], corners[3], corners[0] }, StageStatic.stage.solution);
+            string top1URI = StageStatic.stage.solution.Add(top1, out _, true, null, null);
+            StageStatic.stage.solution.ExposedSolutionFacts.Add(top1URI);
+
             Walls.Add(topology);
+            Trieangles.Add(top0);
+            Trieangles.Add(top1);
         }
 
         // Set Solution
         #region  CannonBallScroll
-        //StageStatic.stage.solution.Add( // for CannonBallScroll
-        //    new ListFact(Walls.Select(q => q.Id).ToArray(), null, new OMS(MMTConstants.TYPE_TO_OMS[typeof(QuadFact)]), StageStatic.stage.solution),
-        //    out bool _, true, null, null
-        //);
+        StageStatic.stage.solution.Add( // for CannonBallScroll
+            new ListFact(Trieangles.Select(q => q.Id).ToArray(), null, new OMS(MMTConstants.TYPE_TO_OMS[typeof(TriangleFact)]), StageStatic.stage.solution),
+            out bool _, true, null, null
+        );
 
         // special case for Prototype
         SOMDoc[] RRRRTupel = new SOMDoc[Walls.Count];
@@ -541,7 +554,7 @@ public static void GenerateCanonBallStage3D()
 
         // Set Gadgets/ Scrolls
         StageStatic.stage.AllowedGadgets = null;
-        StageStatic.stage.AllowedScrolls = new() { MMTConstants.ScrollCannonBall3D };
+        StageStatic.stage.AllowedScrolls = new() { MMTConstants.ScrollCannonBall3D, MMTConstants.ScrollCannonBallT3D };
 
         // Save
         StageStatic.SetMode(StageStatic.Mode.Create);
diff --git a/Assets/Scripts/InteractionEngine/FactHandling/FactRecorder.cs b/Assets/Scripts/InteractionEngine/FactHandling/FactRecorder.cs
index 217af4365c2a6fef92436b8a603918955260a52a..16d19def832537e0b04462df05b12ac615d118ee 100644
--- a/Assets/Scripts/InteractionEngine/FactHandling/FactRecorder.cs
+++ b/Assets/Scripts/InteractionEngine/FactHandling/FactRecorder.cs
@@ -337,7 +337,7 @@ public static T ReInitializeFactOrganizer<T>(T source, bool invoke, out Dictiona
             //if (ExposedFact == null)
             //    continue;
 
-            string exposed_id = target.Add(ExposedFact, out _, false, null, null, isImmutable: true);
+            string exposed_id = target.Add(ExposedFact, out _, false, null, null, isImmutable: true, force: true);
             _old_to_new.TryAdd(element, exposed_id);
         }
 
@@ -361,7 +361,7 @@ public static T ReInitializeFactOrganizer<T>(T source, bool invoke, out Dictiona
             // Add
             {
                 Fact add = ReInitializeFact(s_step.Id);
-                string new_id = target.Add(add, out bool exists, s_step.samestep, used_gadget, s_step.scroll_label);
+                string new_id = target.Add(add, out bool exists, s_step.samestep, used_gadget, s_step.scroll_label, force: true);
                 _old_to_new.TryAdd(s_step.Id, new_id);
 
                 if (exists && target.Workflow.Count <= i - skipped)
@@ -402,6 +402,9 @@ Fact ReInitializeFact(string old_id)
             if (_old_to_new.TryGetValue(old_id, out string newId))
                 return target[newId];
 
+            if (AllFacts.TryGetValue(old_id, out Fact found))
+                return found;
+
             Fact old_Fact = source.JsonFactSpace[old_id];
 
             if (!old_Fact.DependentFactIds.All(id => _old_to_new.ContainsKey(id)))
@@ -544,14 +547,15 @@ private void PruneWorkflow(stepnote not_me)
     /// <param name="scroll_label">the <see cref="Scroll"/>used to create this <see cref="Fact"/> or <c>null</c></param>
     /// <param name="isImmutable">will eneable delete protection, will BE recorded in <see cref="ImmutableFacts"/>, will NOT be recorded in <see cref="Workflow"/></param>
     /// <returns><see cref="Fact.Id"/> of <paramref name="value"/> or <see cref="FindEquivalent(Fact, out string, out bool)">found</see> <see cref="Fact"/> iff <paramref name="exists"/>==<c>true</c></returns>
-    public string Add(Fact value, out bool exists, bool samestep, Gadget gadget, string scroll_label, bool isImmutable = false)
+    public string Add(Fact value, out bool exists, bool samestep, Gadget gadget, string scroll_label, bool isImmutable = false, bool force = false)
     {
+        exists = false;
         soft_resetted = false;
 #pragma warning disable IDE0018 // Inlinevariablendeklaration
         string key;
 #pragma warning restore IDE0018 // Inlinevariablendeklaration
 
-        if (exists = GlobalFactDictionary.FindEquivalent(MyFactSpace, value, out key, out Fact _, out bool _))
+        if (exists = GlobalFactDictionary.FindEquivalent(MyFactSpace, value, out key, out Fact _, out bool _, true, !force))
         {
             if (invoke)
                 AnimateExistingFactEvent.Invoke(
@@ -571,15 +575,14 @@ public string Add(Fact value, out bool exists, bool samestep, Gadget gadget, str
         // brand new Fact
         {
             //buggy mess with AllFacts
-            //if (exists = GlobalFactDictionary.FindEquivalent(AllFacts, value, out key, out Fact found, out bool _))
-            //    value = found;
-            //else
-            //{
+            //if (exists = GlobalFactDictionary.FindEquivalent(AllFacts, value, out key, out Fact found, out bool _, true, false))
+            if (AllFacts.TryGetValue(value.Id, out Fact found))
+                value = found;
+            else
                 if (!value.HasServerTwin)
-                    value.SendToMMT();
+                value.SendToMMT();
 
-                key = value.Id;
-            //}
+            key = value.Id;
 
             GlobalFactDictionary.FactSpaceAdd(this, value);
             MetaInf.Add(key, new meta(marker, true, isImmutable));
@@ -1049,7 +1052,6 @@ public static void FactSpaceRemove(FactRecorder me, string key)
                 FactReferences[key]--;
         }
 
-        private static int waste = 0;
         //TODO? MMT? PERF: O(n), every Fact-insertion
         /// <summary>
         /// Looks for existent <see cref="Fact"/> (<paramref name="found_key"/>) which is very similar or identical (<paramref name="exact"/>) to prposed <see cref="Fact"/> (<paramref name="search"/>)
@@ -1062,38 +1064,35 @@ public static void FactSpaceRemove(FactRecorder me, string key)
         /// <param name="exact"><c>true</c> iff <paramref name="found_key"/> == <paramref name="search"/><see cref="Fact.Id">.Id</see></param>
         /// <param name="allow_exact">if set to <c>false</c>: ignores cases where <paramref name="exact"/> returns <c>true</c></param>
         /// <returns><c>true</c> iff the exact same or an equivalent <see cref="Fact"/> to <paramref name="search"/> was found in <see cref="MyFactSpace"/></returns>
-        public static bool FindEquivalent(IReadOnlyDictionary<string, Fact> FactSpace, Fact search, out string found_key, out Fact found_value, out bool exact, bool allow_exact = true)
+        public static bool FindEquivalent(IReadOnlyDictionary<string, Fact> FactSpace, Fact search, out string found_key, out Fact found_value, out bool exact, bool allow_exact = true, bool allow_equivalent = true)
         {
             found_key = null;
             found_value = null;
-            System.DateTime parseTime = System.DateTime.UtcNow;
+
             if (exact = FactSpace.ContainsKey(search.Id)
              && allow_exact)
             {
                 found_key = search.Id;
                 found_value = FactSpace[found_key];
-                waste += (parseTime - System.DateTime.UtcNow).Milliseconds;
-                Debug.Log(waste);
+
                 return true;
             }
 
             if (!search.DependentFactIds.All(id => FactDict.ContainsKey(id)))
                 return false;
 
-            foreach (var entry in FactSpace)
-            {
-                if ((allow_exact || entry.Key != search.Id)
-                 && entry.Value.Equivalent(search))
+            if (allow_equivalent)
+                foreach (var entry in FactSpace)
                 {
-                    found_value = entry.Value;
-                    found_key = found_value.Id; // may: != entry.Key ... Why?
-                    waste += (parseTime - System.DateTime.UtcNow).Milliseconds;
-                    Debug.Log(waste);
-                    return true;
+                    if ((allow_exact || entry.Key != search.Id)
+                     && entry.Value.Equivalent(search))
+                    {
+                        found_value = entry.Value;
+                        found_key = found_value.Id; // may: != entry.Key ... Why?
+
+                        return true;
+                    }
                 }
-            }
-            waste += (parseTime - System.DateTime.UtcNow).Milliseconds;
-            Debug.Log(waste);
             return false;
         }
     }
diff --git a/Assets/Scripts/InteractionEngine/FactHandling/FactSpawner.cs b/Assets/Scripts/InteractionEngine/FactHandling/FactSpawner.cs
index 5ab66dde863c8d585cb08b05d99352fa51802f63..daa326fd46bd533571ced6d8c09c315e05d82845 100644
--- a/Assets/Scripts/InteractionEngine/FactHandling/FactSpawner.cs
+++ b/Assets/Scripts/InteractionEngine/FactHandling/FactSpawner.cs
@@ -49,6 +49,8 @@ public void SpawnFactRepresentation(Fact fact)
                 SpawnRingAndCircle(CircleFact); break;
             case QuadFact QuadFact:
                 SpawnQuad(QuadFact); break;
+            case TriangleFact TrisFact:
+                SpawnTris(TrisFact); break;
             case ConeVolumeFact ConeVolumeFact:
                 SpawnCone(ConeVolumeFact); break;
             case TruncatedConeVolumeFact TruncatedConeVolumeFact:
@@ -165,6 +167,19 @@ public void SpawnQuad(QuadFact fact)
             gen.Vertices = fact.Points.Select(p => p.Position).ToArray();
     }
 
+    public void SpawnTris(TriangleFact fact)
+    {
+        GameObject prism = GameObject.Instantiate(Prism);
+        fact.WorldRepresentation = prism.GetComponentInChildren<FactObject3D>();
+        fact.WorldRepresentation.Fact = fact;
+
+        prism.transform.SetPositionAndRotation(fact.Position, fact.Rotation);
+
+        PrismGenerator[] prisms = prism.GetComponentsInChildren<PrismGenerator>();
+        foreach (var gen in prisms)
+            gen.Vertices = fact.Verticies;
+    }
+
     public void SpawnCone(ConeVolumeFact fact)
     {
         GameObject prism = GameObject.Instantiate(Cone);
diff --git a/Assets/Scripts/InteractionEngine/FactHandling/Facts/Fact.cs b/Assets/Scripts/InteractionEngine/FactHandling/Facts/Fact.cs
index d61e1d64b6871a3b75bf03e1892f786efd2ede1b..d5468a4deb8f4ec767b460582fd49339bb369db0 100644
--- a/Assets/Scripts/InteractionEngine/FactHandling/Facts/Fact.cs
+++ b/Assets/Scripts/InteractionEngine/FactHandling/Facts/Fact.cs
@@ -104,6 +104,7 @@ public static class ParsingDictionary
 [JsonSubtypes.KnownSubType(typeof(DynamicListFact), nameof(DynamicListFact))]
 [JsonSubtypes.KnownSubType(typeof(DynamicTupleFact), nameof(DynamicTupleFact))]
 [JsonSubtypes.KnownSubType(typeof(QuadFact), nameof(QuadFact))]
+[JsonSubtypes.KnownSubType(typeof(TriangleFact), nameof(TriangleFact))]
 [JsonSubtypes.KnownSubType(typeof(RealLitFact), nameof(RealLitFact))]
 public abstract class Fact
 {
@@ -162,6 +163,9 @@ public SOMDoc ServerDefinition
     }
     private SOMDoc _ServerDefinition = null;
 
+    //public MMTFact MMTFact => _MMTFact ??= MakeMMTDeclaration();
+    //private MMTFact _MMTFact = null;
+
     [JsonIgnore]
     public bool HasServerTwin => ServerDefinition is OMS;
 
diff --git a/Assets/Scripts/InteractionEngine/FactHandling/Facts/FunctionFact.cs b/Assets/Scripts/InteractionEngine/FactHandling/Facts/FunctionFact.cs
index 87c6f9ac2d79a7fed59b325774333e72273a2677..a042758945dc97653ece76b4b1b3d283a2472afe 100644
--- a/Assets/Scripts/InteractionEngine/FactHandling/Facts/FunctionFact.cs
+++ b/Assets/Scripts/InteractionEngine/FactHandling/Facts/FunctionFact.cs
@@ -197,7 +197,7 @@ protected override void RecalculateTransform() { }
 
         if (((MMTGeneralFact)fact).defines is not FUN fun
             && (((MMTGeneralFact)fact).defines is not FallbackWrapper SFW
-            || (fun = SFW.SFunction as FUN) == null)
+            || (fun = SFW.Wrapper as FUN) == null)
         )
             yield break;
 
diff --git a/Assets/Scripts/InteractionEngine/FactHandling/Facts/MMTTypes.cs b/Assets/Scripts/InteractionEngine/FactHandling/Facts/MMTTypes.cs
index 142dbd55fd2533a8334c3ca6c3378997424e2239..5e3a37b728cde09509128075aea6ee38cb3455f0 100644
--- a/Assets/Scripts/InteractionEngine/FactHandling/Facts/MMTTypes.cs
+++ b/Assets/Scripts/InteractionEngine/FactHandling/Facts/MMTTypes.cs
@@ -256,7 +256,7 @@ public SOMDoc SOMDocIndexer(int i)
             new OMS(MMTConstants.IndexList),
             new[] {
                 indirect_payload,
-                new OMLIT<float>(i)
+                new OMLIT<int>(i)
         });
 
     protected override bool EquivalentWrapped(DynamicListFact f1, DynamicListFact f2)
diff --git a/Assets/Scripts/InteractionEngine/FactHandling/Facts/UnsortedFact.cs b/Assets/Scripts/InteractionEngine/FactHandling/Facts/UnsortedFact.cs
index 95bae89c01b219234e0a2f27f9a9865901e971a4..5f2302e8e7d4acc13f42333c6e972e7a62ed3089 100644
--- a/Assets/Scripts/InteractionEngine/FactHandling/Facts/UnsortedFact.cs
+++ b/Assets/Scripts/InteractionEngine/FactHandling/Facts/UnsortedFact.cs
@@ -361,6 +361,20 @@ public PointFact[] Points
     [JsonIgnore]
     public Vector3 Normal, Tangents, AltTangents;
 
+    [JsonIgnore] public Vector3 point1 => Points[0].Point;
+    [JsonIgnore] public Vector3 point2 => Points[1].Point;
+    [JsonIgnore] public Vector3 point3 => Points[2].Point;
+    [JsonIgnore] public Vector3 point4 => Points[3].Point;
+    [JsonIgnore] public Vector3 u => -Tangents;
+    [JsonIgnore] public Vector3 v => -AltTangents;
+    [JsonIgnore] public Vector3 vc => Vector3.Cross(u, v);
+    [JsonIgnore] public Vector3 norm_vec => Normal;
+    [JsonIgnore] public float a => Normal.x;
+    [JsonIgnore] public float b => Normal.y;
+    [JsonIgnore] public float c => Normal.z;
+    [JsonIgnore] public float d;
+    [JsonIgnore] public float length; //??
+
     /// <summary> \copydoc Fact.Fact </summary>
     public QuadFact() : base() { }
 
@@ -397,6 +411,8 @@ private void Init(string[] pid_corners)
         AltTangents = (Points[0].Point - Points[2].Point).normalized;
         Normal = Vector3.Cross(Tangents, AltTangents).normalized;
 
+        d = Vector3.Dot(Normal, Points[0].Point);
+
         if (Math3d.vectorPrecission < Math.Abs(Vector3.Dot(Normal, Points[0].Point - Points[3].Point)))
             throw new ArgumentException("All Points must lie on the same Plane!");
     }
@@ -462,6 +478,19 @@ public class TriangleFact : FactWrappedCRTP<TriangleFact>
     [JsonIgnore]
     public Vector3 Normal, Tangents, AltTangents;
 
+    [JsonIgnore] public Vector3 point1 => Verticies[0];
+    [JsonIgnore] public Vector3 point2 => Verticies[1];
+    [JsonIgnore] public Vector3 point3 => Verticies[2];
+    [JsonIgnore] public Vector3 u => -Tangents;
+    [JsonIgnore] public Vector3 v => -AltTangents;
+    [JsonIgnore] public Vector3 vc => Vector3.Cross(u, v);
+    [JsonIgnore] public Vector3 norm_vec => Normal;
+    [JsonIgnore] public float a => Normal.x;
+    [JsonIgnore] public float b => Normal.y;
+    [JsonIgnore] public float c => Normal.z;
+    [JsonIgnore] public float d;
+    [JsonIgnore] public float length; //??
+
     /// <summary> \copydoc Fact.Fact </summary>
     public TriangleFact() : base() { }
 
@@ -513,10 +542,16 @@ public override MMTFact MakeMMTDeclaration()
     }
 
     public override SOMDoc Defines()
-        => new OMA(
-                new OMS(MMTConstants.CreateTriangle),
-                Verticies.Select(vert => SOMDoc.MakeVector3(vert)).ToArray()
-            );
+    //=> new OMA(
+    //        new OMS(MMTConstants.MakeType),
+    //        new[] {
+    //            new OML_Member("point1", null, SOMDoc.MakeVector3(point1)),
+    //        }
+    //    );
+    => new OMA(
+            new OMS(MMTConstants.CreateTriangle),
+            Verticies.Select(vert => SOMDoc.MakeVector3(vert)).ToArray()
+        );
 
     protected override bool EquivalentWrapped(TriangleFact f1, TriangleFact f2)
     {
@@ -537,8 +572,8 @@ protected override string[] GetDependentFactIds()
 
     protected override void RecalculateTransform()
     {
-        Position = Verticies[0];
-        Rotation = Quaternion.LookRotation(Tangents, Vector3.up);
+        //Position = Verticies[0];
+        //Rotation = Quaternion.LookRotation(Tangents, Vector3.up);
     }
 
     protected override Fact _ReInitializeMe(Dictionary<string, string> old_to_new, FactRecorder organizer)
diff --git a/Assets/Scripts/InteractionEngine/FactHandling/Facts/UnsortedFact.cs.meta b/Assets/Scripts/InteractionEngine/FactHandling/Facts/UnsortedFact.cs.meta
new file mode 100644
index 0000000000000000000000000000000000000000..d8629c1f3275dbf59d23c4f838bc048cac3fb574
--- /dev/null
+++ b/Assets/Scripts/InteractionEngine/FactHandling/Facts/UnsortedFact.cs.meta
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: a89cb825948ed3243b9f280550897fdd
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/Assets/Scripts/InventoryStuff/ScrollDetails.cs b/Assets/Scripts/InventoryStuff/ScrollDetails.cs
index c00da8310920accec2592f7446c66712772d7539..9e26a9fb34024cab3f39934edc3727fc06aa6a65 100644
--- a/Assets/Scripts/InventoryStuff/ScrollDetails.cs
+++ b/Assets/Scripts/InventoryStuff/ScrollDetails.cs
@@ -46,6 +46,7 @@ public static ScrollDetails Instance
     private readonly IReadOnlyList<string> NoDynamicScroll = new List<string>() {
         MMTConstants.ScrollCannonBall2D,
         MMTConstants.ScrollCannonBall3D,
+        MMTConstants.ScrollCannonBallT3D,
     };
 
     void Awake()
@@ -167,6 +168,35 @@ private int[] PrePopulateActiveScroll()
 
                 return CaseCanonBall(lid_override);
 
+            case MMTConstants.ScrollCannonBallT3D:
+                lid_override = StageStatic.stage.solution.MyFactSpace.Values
+                .FirstOrDefault(sol => sol is ListFact lf
+                                    && lf.ListType is OMA tpOMA
+                                    && tpOMA.arguments[0] is OMS triOMS
+                                    && triOMS.uri == MMTConstants.Triangle)
+                ?.Id;
+
+                //List<TriangleFact> TriList = StageBehaviour.GenerateMMTCollider();
+                //string[] list = new string[TriList.Count];
+                //for (int i = 0; i < 100; i++)
+                //{
+                //    list[i] = FactAdder.AddFactIfNotFound(TriList[i], out _, false, null, null).Id;
+                //}
+                //lid_override = FactAdder.AddFactIfNotFound(
+                //        new ListFact(list, null, new OMS(MMTConstants.TYPE_TO_OMS[typeof(TriangleFact)]), StageStatic.stage.factState)
+                //    , out _, false, null, null).Id;
+
+                //lid_override = FactAdder.AddFactIfNotFound(
+                //    new DynamicListFact(
+                //        TriList.ConvertAll(t => (object)t),
+                //        SOMDoc.MakeShallowList(TriList.Select(t => t.Defines()).ToArray()),
+                //        new OMS(MMTConstants.TYPE_TO_OMS[typeof(TriangleFact)]),
+                //        StageStatic.stage.factState
+                //    ),
+                //    out _, false, null, null).Id;
+
+                return CaseCanonBall(lid_override);
+
             default:
                 return new int[0];
         }
diff --git a/Assets/Scripts/MMTServer/CommunicationProtocoll/MMTConstants.cs b/Assets/Scripts/MMTServer/CommunicationProtocoll/MMTConstants.cs
index 9826bb0c4600ad7a32b1eb0f72caf2cfee8f8357..a812b891e5ee900db03c1f430f1ee9cea832c196 100644
--- a/Assets/Scripts/MMTServer/CommunicationProtocoll/MMTConstants.cs
+++ b/Assets/Scripts/MMTServer/CommunicationProtocoll/MMTConstants.cs
@@ -8,13 +8,19 @@ namespace REST_JSON_API
     public static class MMTConstants
     {
         public static readonly string Point = "http://mathhub.info/MitM/core/geometry?3DGeometry?point";
+        public static readonly string ScalarProduct = "http://mathhub.info/MitM/core/geometry?3DGeometry?scalar_productI";
+        public static readonly string PointSubtractI = "http://mathhub.info/MitM/core/geometry?3DGeometry?point_subtractI";
+        public static readonly string PointAddI = "http://mathhub.info/MitM/core/geometry?3DGeometry?point_addI";
+        public static readonly string VecMultI = "http://mathhub.info/MitM/core/geometry?3DGeometry?vec_multI";
+        public static readonly string VecCross = "http://mathhub.info/MitM/core/geometry?3DGeometry?vec_cross";
+
         public static readonly string LineType = "http://mathhub.info/MitM/core/geometry?Geometry/Common?line_type";
         public static readonly string LineOf = "http://mathhub.info/MitM/core/geometry?Geometry/Common?lineOf";
 
         public static readonly string Wall = "http://mathhub.info/FrameIT/frameworld?Walls?wall";
         public static readonly string CreateWall = "http://mathhub.info/FrameIT/frameworld?Walls?create_wall";
-        public static readonly string Triangle = "?tris";
-        public static readonly string CreateTriangle = "?create_tris";
+        public static readonly string Triangle = "http://mathhub.info/FrameIT/frameworld?Triangles?wall";
+        public static readonly string CreateTriangle = "http://mathhub.info/FrameIT/frameworld?Triangles?create_wall";
 
         public static readonly string OnLine = "http://mathhub.info/MitM/core/geometry?Geometry/Common?onLine";
         public static readonly string Ded = "http://mathhub.info/MitM/Foundation?Logic?ded";
@@ -24,6 +30,7 @@ public static class MMTConstants
         public static readonly string Sketch = "http://mathhub.info/MitM/Foundation?InformalProofs?proofsketch";
         public static readonly string RealLit = "http://mathhub.info/MitM/Foundation?RealLiterals?real_lit";
         public static readonly string Bool = "http://cds.omdoc.org/urtheories?Bool?BOOL";
+        public static readonly string Proposition = "http://mathhub.info/MitM/Foundation?Logic?prop";
 
         public static readonly string ParallelLine = "http://mathhub.info/MitM/core/geometry?Geometry/Common?parallelLine";
         //public static readonly string RectangleFact = "http://mathhub.info/FrameIT/frameworld?FrameITRectangles?rectangleType";
@@ -83,10 +90,14 @@ public static class MMTConstants
         public static readonly string PartialAggregate = "?Step";
         public static readonly string FeedForwardWhile = "http://mathhub.info/FrameIT/frameworld?StepUntil?stepUntil";
         public static readonly string FeedForwardWhile2 = "http://mathhub.info/FrameIT/frameworld?W3DBouncingScroll?stepUntil";
+        public static readonly string FeedForwardWhileT2 = "http://mathhub.info/FrameIT/frameworld?T3DBouncingScroll?stepUntil";
+        public static readonly string Filter = "http://gl.mathhub.info/MMT/LFX/Datatypes?ListOperations?filter";
         public static readonly string Filter2 = "http://mathhub.info/FrameIT/frameworld?W3DBouncingScroll?filter2";
+        public static readonly string FilterT2 = "http://mathhub.info/FrameIT/frameworld?T3DBouncingScroll?filter2";
         public static readonly string Fold = "http://gl.mathhub.info/MMT/LFX/Datatypes?ListOperations?fold";
-        public static readonly string IndexList = "IndexList";
+        public static readonly string IndexList = "http://mathhub.info/FrameIT/frameworld?GetListAtInd?getListAtInd";
         public static readonly string ToArray = "?ToArray";
+        public static readonly string Invoke = "?lambda";
 
         public static readonly string Sin = "Sin";
         public static readonly string Cos = "Cos";
@@ -113,6 +124,7 @@ public static class MMTConstants
         public const string ScrollTruncatedConeVolumeScroll = "http://mathhub.info/FrameIT/frameworld?TruncatedConeVolumeScroll";
         public const string ScrollCannonBall2D = "http://mathhub.info/FrameIT/frameworld?WBouncingScroll";
         public const string ScrollCannonBall3D = "http://mathhub.info/FrameIT/frameworld?W3DBouncingScroll";
+        public const string ScrollCannonBallT3D = "http://mathhub.info/FrameIT/frameworld?T3DBouncingScroll";
 
         public static readonly IReadOnlyDictionary<string, Type> OMS_TO_TYPE = new Dictionary<string, Type>()
         {
@@ -122,6 +134,8 @@ public static class MMTConstants
                 typeof(LineFact) },
             { Wall,
                 typeof(QuadFact) },
+            { Triangle,
+                typeof(TriangleFact) },
             { Angle,
                 typeof(AngleFact) },
             { Eq,
@@ -180,6 +194,8 @@ public static class MMTConstants
                 typeof(Func<,,>).MakeGenericType(typeof(float), typeof(float), typeof(float)) },
             { MinusRealLit,
                 typeof(Func<,,>).MakeGenericType(typeof(float), typeof(float), typeof(float)) },
+            { Proposition,
+                typeof(bool) }, //typeof(Func<,>).MakeGenericType(Type.MakeGenericMethodParameter(0), typeof(bool)) },
             { ProjL, // how?
                 typeof(Func<,>) }, //.MakeGenericType(typeof(Tuple))
 
@@ -207,9 +223,11 @@ public static class MMTConstants
           { typeof(PointFact),
               Point },
           { typeof(object),
-              null },
+              "NaN" },
           { typeof(uint),
-              null },
+              "NaN" },
+          { typeof(int),
+              "NaN" },
         });
 
         public static readonly IReadOnlyDictionary<string, string> URI_TO_TypeOF = new Dictionary<string, string> {
@@ -217,6 +235,10 @@ public static class MMTConstants
                 CircleType3d },
             { LineOf,
                 LineType },
+            { CreateTriangle,
+                Triangle },
+            { CreateWall,
+                Wall },
         };
         public static readonly IReadOnlyDictionary<string, string> TypeOF_TO_URI = URI_TO_TypeOF.ReverseKeyVal();
 
diff --git a/Assets/Scripts/MMTServer/CommunicationProtocoll/SOMDocToLambdaExpression.cs b/Assets/Scripts/MMTServer/CommunicationProtocoll/SOMDocToLambdaExpression.cs
index b39aae22508ec351230a2eab5b69378f2c2fa5a6..2d1422a162b2bccde7d19395e869f3f8d29938e0 100644
--- a/Assets/Scripts/MMTServer/CommunicationProtocoll/SOMDocToLambdaExpression.cs
+++ b/Assets/Scripts/MMTServer/CommunicationProtocoll/SOMDocToLambdaExpression.cs
@@ -104,6 +104,12 @@ protected static class SOMDocToLambdaExpression
                 InsertFrontListLiteral },
             { MMTConstants.ListType,
                 Identity0 },
+            { MMTConstants.ScalarProduct,
+                CallAnyFunction(false, "Dot", typeof(Vector3)) },
+            { MMTConstants.VecCross,
+                CallAnyFunction(false, "Cross", typeof(Vector3)) },
+            //{ MMTConstants.VecMultI,
+            //    CallAnyFunction(false, "Scale", typeof(Vector3)) },
             { MMTConstants.ProjL,
                 ProjLVecTupel },
             { MMTConstants.ProjR,
@@ -114,16 +120,26 @@ protected static class SOMDocToLambdaExpression
                     CallAnyFunction(false, "ToList", typeof(Enumerable))})},
             { MMTConstants.FeedForwardWhile,
                 FeedForwardUntil },
+            { MMTConstants.FeedForwardWhileT2,
+                FeedForwardUntil },
             { MMTConstants.FeedForwardWhile2,
                 FeedForwardUntil },
             { MMTConstants.PartialAggregate,
                 CallAnyFunction(false, "PartialAggregate", typeof(IEnumerableExtensions)) },
             { MMTConstants.ToArray,
                 CallAnyFunction(false, "ToArray", typeof(Enumerable)) },
+            { MMTConstants.Filter,
+                ChainMakes(new[]{
+                    CallAnyFunction(false, "Where", typeof(Enumerable)),
+                    CallAnyFunction(false, "ToList", typeof(Enumerable))})},
             { MMTConstants.Filter2,
                 ChainMakes(new[]{
                     CallAnyFunction(false, "Where", typeof(Enumerable)),
                     CallAnyFunction(false, "ToList", typeof(Enumerable))})},
+            { MMTConstants.FilterT2,
+                ChainMakes(new[]{
+                    CallAnyFunction(false, "Where", typeof(Enumerable)),
+                    CallAnyFunction(false, "ToList", typeof(Enumerable))})},
             { MMTConstants.Fold,
                 Aggregate},
             { MMTConstants.PropertyX,
@@ -138,12 +154,16 @@ protected static class SOMDocToLambdaExpression
                 IfThenElse },
             { MMTConstants.GetField,
                 GetPropertyOrFieldDynamic },
+            { MMTConstants.Invoke,
+                PartialInvoke },
         };
 
             private static readonly Dictionary<string, ExpressionType> MMTtoBinaryExpressionType = new()
         {
             { MMTConstants.AddRealLit,
                 ExpressionType.Add},
+            { MMTConstants.PointAddI,
+                ExpressionType.Add},
             { "AddAssign",
                 ExpressionType.AddAssign},
             { "AddAssignChecked",
@@ -186,6 +206,8 @@ protected static class SOMDocToLambdaExpression
                 ExpressionType.ModuloAssign},
             { MMTConstants.TimesRealLit,
                 ExpressionType.Multiply},
+            { MMTConstants.VecMultI,
+                ExpressionType.Multiply},
             { "MultiplyAssign",
                 ExpressionType.MultiplyAssign},
             { "MultiplyAssignChecked",
@@ -208,7 +230,7 @@ protected static class SOMDocToLambdaExpression
                 ExpressionType.RightShift},
             { "RightShiftAssign",
                 ExpressionType.RightShiftAssign},
-            { "Subtract",
+            { MMTConstants.PointSubtractI,
                 ExpressionType.Subtract},
             { "SubtractAssign",
                 ExpressionType.SubtractAssign},
@@ -266,7 +288,7 @@ void ThrowArgumentException(ExpressionType expression_cast, int expected)
                 ParameterExpression[] lambda_params =
                     lambda_applicant
                     .SelectMany(l => l.Parameters)
-                    .ToArray(); //PERF: .ToList().Sort() => .BinarySearch; //Too much overhead?
+                    .ToArray();
                 ParameterExpression[] found_bound_params =
                     bound_params
                     .Where(p => lambda_params.Contains(p))
@@ -274,58 +296,30 @@ void ThrowArgumentException(ExpressionType expression_cast, int expected)
 
                 if (FactRecorder.AllFacts.TryGetValue(URI, out Fact fact))
                 {
-                    Expression lambda_lambda;
-                    int ll_params_c;
-                    IEnumerable<Type> ll_params;
-
+                    Expression lambda_orig;
                     if (fact is not FunctionFact ffact)
                     {
-                        MMTFact decl = fact.MakeMMTDeclaration();
-                        SOMDoc df = decl is MMTGeneralFact gf
-                            ? gf.defines
-                            : (decl as MMTValueFact).lhs;
-
-                        LambdaExpression lambda_orig = df.GetLambdaExpression();
-                        if (lambda_orig.Body is not LambdaExpression lambda_lambda1
-                         || lambda_applicant.Length == 0)
-                            return lambda_orig;
-
-                        lambda_lambda = lambda_lambda1;
-                        ll_params_c = lambda_lambda1.Parameters.Count();
-                        ll_params = lambda_lambda1.Parameters.Select(p => p.Type);
+                        LambdaExpression flambda_fact = fact
+                            .MakeMMTDeclaration()
+                            .GetDefines()
+                            .GetLambdaExpression();
+
+                        if (lambda_applicant.Length == 0)
+                            return flambda_fact;
+
+                        lambda_orig = flambda_fact;
                     }
                     else
                     {
-                        lambda_lambda = ffact.LambdaExpression;
-                        ll_params_c = ffact.Signature.Length - 1;
-                        ll_params = ffact.Signature.Take(ll_params_c);
-                    }
-
-                    int free_params = ll_params_c - lambda_applicant.Length;
-                    if (free_params <= 0)
-                        return Expression.Lambda(
-                            Expression.Invoke(
-                                lambda_lambda,
-                                lambda_applicant.Select(app => app.Body).Take(ll_params_c)),
-                            found_bound_params
-                        );
-
-                    ParameterExpression[] new_params =
-                        ll_params
-                        .Skip(lambda_applicant.Length)
-                        .Select(t => Expression.Parameter(t))
-                        .ToArray();
+                        if (lambda_applicant.Length == 0)
+                            return Expression.Lambda(
+                                    ffact.LambdaExpression,
+                                    found_bound_params
+                                );
 
-                    return Expression.Lambda(
-                        Expression.Lambda(
-                            Expression.Invoke(
-                                lambda_lambda,
-                                lambda_applicant.Select(app => app.Body).AppendRange(new_params)
-                            ),
-                            new_params
-                        ),
-                        found_bound_params
-                    );
+                        lambda_orig = ffact.LambdaExpression;
+                    }
+                    return _PartialInvoke(lambda_orig, lambda_applicant, found_bound_params);
                 }
                 else
                 if (MMTtoUnaryExpressionType.TryGetValue(URI, out var unnary_type))
@@ -359,6 +353,44 @@ void ThrowArgumentException(ExpressionType expression_cast, int expected)
                 throw new NotImplementedException("Could not map URI: \"" + URI + "\"");
             }
 
+            public static LambdaExpression PartialInvoke(LambdaExpression[] lambda_applicant, LambdaExpression[] lambda_arguments, ParameterExpression[] bound_params)
+                => _PartialInvoke(lambda_applicant[0].Body, lambda_arguments, bound_params);
+
+            public static LambdaExpression _PartialInvoke(Expression func, LambdaExpression[] lambda_arguments, ParameterExpression[] bound_params)
+            {
+                if (!FuncExtensions.IsFuncType(func.Type, out int signature_count))
+                    throw new ArgumentException($"{nameof(func)} has to be Func");
+
+                int params_count = signature_count - 1;
+                IEnumerable<Type> params_type = func.Type.GetGenericArguments().Take(params_count);
+                
+                int free_params = params_count - lambda_arguments.Length;
+                if (free_params <= 0)
+                    return Expression.Lambda(
+                        Expression.Invoke(
+                            func,
+                            lambda_arguments.Select(app => app.Body).Take(params_count)),
+                        bound_params
+                    );
+
+                ParameterExpression[] new_params =
+                    params_type
+                    .Skip(lambda_arguments.Length)
+                    .Select(t => Expression.Parameter(t))
+                    .ToArray();
+
+                return Expression.Lambda(
+                    Expression.Lambda(
+                        Expression.Invoke(
+                            func,
+                            lambda_arguments.Select(app => app.Body).AppendRange(new_params)
+                        ),
+                        new_params
+                    ),
+                    bound_params
+                );
+            }
+
             public static CustomFunction ChainMakes(CustomFunction[] makes)
                 => (LambdaExpression[] lambda_applicant, LambdaExpression[] lambda_arguments, ParameterExpression[] bound_params) =>
                 {
diff --git a/Assets/Scripts/MMTServer/CommunicationProtocoll/SOMDocs.cs b/Assets/Scripts/MMTServer/CommunicationProtocoll/SOMDocs.cs
index 63222df1c9195dae6f58c91eb58cd0a0df38f59b..2c3aa1122a0a9180f5f91e44c59119f5993c30b9 100644
--- a/Assets/Scripts/MMTServer/CommunicationProtocoll/SOMDocs.cs
+++ b/Assets/Scripts/MMTServer/CommunicationProtocoll/SOMDocs.cs
@@ -126,7 +126,10 @@ public static bool Equivalent(SOMDoc sd1, SOMDoc sd2)
         public LambdaExpression GetLambdaExpression()
             => GetLambdaExpression(new LambdaExpression[0], new LambdaExpression[0], new ParameterExpression[0]);
 
-        protected internal abstract LambdaExpression GetLambdaExpression(LambdaExpression[] lambda_applicant, LambdaExpression[] lambda_arguments, ParameterExpression[] bound_params);
+        public LambdaExpression GetLambdaExpression(LambdaExpression[] lambda_applicant, LambdaExpression[] lambda_arguments, ParameterExpression[] bound_params)
+            => _GetLambdaExpression(lambda_applicant, lambda_arguments, bound_params);
+
+        protected abstract LambdaExpression _GetLambdaExpression(LambdaExpression[] lambda_applicant, LambdaExpression[] lambda_arguments, ParameterExpression[] bound_params);
 
         public abstract override string ToString();
 
@@ -256,7 +259,7 @@ protected override FUNTYPE MapURIsWrapped(Dictionary<string, string> old_to_new)
         public override string[] GetDependentFactIds()
             => new string[0];
 
-        protected internal override LambdaExpression GetLambdaExpression(LambdaExpression[] lambda_applicant, LambdaExpression[] lambda_arguments, ParameterExpression[] bound_params)
+        protected override LambdaExpression _GetLambdaExpression(LambdaExpression[] lambda_applicant, LambdaExpression[] lambda_arguments, ParameterExpression[] bound_params)
         {
             throw new NotImplementedException();
         }
@@ -288,7 +291,7 @@ public FUN(Param[] @params, SOMDoc body)
         public class Param
         {
             public string name;
-            [JsonProperty("tp")]
+            //[JsonProperty("tp")]
             public SOMDoc type;
 
             [JsonConstructor]
@@ -323,7 +326,7 @@ protected override FUN MapURIsWrapped(Dictionary<string, string> old_to_new)
         public override string[] GetDependentFactIds()
             => body.GetDependentFactIds();
 
-        protected internal override LambdaExpression GetLambdaExpression(LambdaExpression[] lambda_applicant, LambdaExpression[] lambda_arguments, ParameterExpression[] bound_params)
+        protected override LambdaExpression _GetLambdaExpression(LambdaExpression[] lambda_applicant, LambdaExpression[] lambda_arguments, ParameterExpression[] bound_params)
         {
             ParameterExpression[] local_param =
                 @params.Select(p => Expression.Parameter(p.type.ToType(), p.name)).ToArray();
@@ -331,19 +334,20 @@ protected internal override LambdaExpression GetLambdaExpression(LambdaExpressio
 
             LambdaExpression body_lambda =
                 body.GetLambdaExpression(
-                    lambda_applicant,
-                    lambda_arguments,
+                    new LambdaExpression[0],
+                    new LambdaExpression[0],
                     bound_params.ShallowCloneAppend(local_param)
                 );
 
-            return
-                Expression.Lambda(
-                    Expression.Lambda(
-                        body_lambda.Body,
-                        local_param
-                    ),
-                    bound_params
-                );
+            LambdaExpression ret = Expression.Lambda(body_lambda.Body, local_param);
+
+            if (lambda_applicant.Length > 0)
+                return SOMDocToLambdaExpression._PartialInvoke(ret, lambda_applicant, bound_params);
+            else
+                return Expression.Lambda(
+                        ret,
+                        bound_params
+                    );
         }
 
         protected internal override SOMDoc SOMDocType(SOMDoc[] args, Param[] bound_params)
@@ -399,7 +403,7 @@ protected internal override Type ToType(Type[] args, (string name, Type type)[]
             return p.type;
         }
 
-        protected internal override LambdaExpression GetLambdaExpression(LambdaExpression[] lambda_applicant, LambdaExpression[] lambda_arguments, ParameterExpression[] bound_params)
+        protected override LambdaExpression _GetLambdaExpression(LambdaExpression[] lambda_applicant, LambdaExpression[] lambda_arguments, ParameterExpression[] bound_params)
         {
             ParameterExpression v = bound_params.FirstOrDefault(param => param.Name.Equals(name));
             if (v == null)
@@ -441,7 +445,7 @@ protected override bool EquivalentWrapped(OMA sd2)
                 .Zip(sd2.arguments, (arg1, arg2) => Equivalent(arg1, arg2))
                 .All(b => b);
 
-        protected internal override LambdaExpression GetLambdaExpression(LambdaExpression[] lambda_arguments_paps, LambdaExpression[] lambda_arguments_grands, ParameterExpression[] bound_params)
+        protected override LambdaExpression _GetLambdaExpression(LambdaExpression[] lambda_arguments_paps, LambdaExpression[] lambda_arguments_grands, ParameterExpression[] bound_params)
         {
             if (applicant is OMS OMSMake)
                 if (OMSMake.uri == MMTConstants.MakeType
@@ -547,7 +551,7 @@ protected override bool EquivalentWrapped(OMS sd2)
         }
 
 
-        protected internal override LambdaExpression GetLambdaExpression(LambdaExpression[] lambda_arguments_paps, LambdaExpression[] lambda_arguments_grands, ParameterExpression[] bound_params)
+        protected override LambdaExpression _GetLambdaExpression(LambdaExpression[] lambda_arguments_paps, LambdaExpression[] lambda_arguments_grands, ParameterExpression[] bound_params)
             => SOMDocToLambdaExpression.MakeLambdaExpression(uri, lambda_arguments_paps, lambda_arguments_grands, bound_params);
 
         public override string ToString()
@@ -670,7 +674,7 @@ public override string ToString()
         protected override bool EquivalentWrapped(RAW sd2)
             => throw new NotImplementedException(); //xml == sd2.xml; // only exact
 
-        protected internal override LambdaExpression GetLambdaExpression(LambdaExpression[] lambda_applicant, LambdaExpression[] lambda_arguments, ParameterExpression[] bound_params)
+        protected override LambdaExpression _GetLambdaExpression(LambdaExpression[] lambda_applicant, LambdaExpression[] lambda_arguments, ParameterExpression[] bound_params)
             => throw new NotSupportedException();
 
         protected internal override Type ToType(Type[] args, (string name, Type type)[] bound_params)
@@ -719,7 +723,7 @@ protected override bool EquivalentWrapped(OML_Member sd2)
         protected override OML_Member MapURIsWrapped(Dictionary<string, string> old_to_new)
             => new(name, of_type?.MapURIs(old_to_new), defines?.MapURIs(old_to_new));
 
-        protected internal override LambdaExpression GetLambdaExpression(LambdaExpression[] lambda_applicant, LambdaExpression[] lambda_arguments, ParameterExpression[] bound_params)
+        protected override LambdaExpression _GetLambdaExpression(LambdaExpression[] lambda_applicant, LambdaExpression[] lambda_arguments, ParameterExpression[] bound_params)
             => defines == null && of_type == null
             ? Expression.Lambda(Expression.Constant(name, typeof(string))) // PropertyInfo? => would need info about sister element in OMA.arguments
             : throw new NotSupportedException(); //=> new KeyValuePair<string, Expression>(name, value.GetLambdaExpression(lambda_applicant, lambda_arguments, bound_params))
@@ -760,7 +764,7 @@ protected internal override SOMDoc SOMDocType(SOMDoc[] args, FUN.Param[] bound_p
         protected override bool EquivalentWrapped(OMLIT<T> sd2)
             => ApproximationComparer.Instance.Equals(value, sd2);
 
-        protected internal override LambdaExpression GetLambdaExpression(LambdaExpression[] lambda_applicant, LambdaExpression[] lambda_arguments, ParameterExpression[] bound_params)
+        protected override LambdaExpression _GetLambdaExpression(LambdaExpression[] lambda_applicant, LambdaExpression[] lambda_arguments, ParameterExpression[] bound_params)
             => Expression.Lambda(Expression.Constant(value, typeof(T)), null);
 
         public override string ToString()
@@ -788,7 +792,7 @@ public class OMNONE : SOMDocCRTP<OMNONE>
 
         protected override OMNONE MapURIsWrapped(Dictionary<string, string> old_to_new) => Instance;
 
-        protected internal override LambdaExpression GetLambdaExpression(LambdaExpression[] lambda_applicant, LambdaExpression[] lambda_arguments, ParameterExpression[] bound_params)
+        protected override LambdaExpression _GetLambdaExpression(LambdaExpression[] lambda_applicant, LambdaExpression[] lambda_arguments, ParameterExpression[] bound_params)
             => throw new NotSupportedException("Not possible for OMNONE");
 
         protected internal override SOMDoc SOMDocType(SOMDoc[] args, FUN.Param[] bound_params)
@@ -803,33 +807,33 @@ public class FallbackWrapper : SOMDocCRTP<FallbackWrapper>
     {
         public new string kind = "SFunction";
 
-        public SOMDoc SFunction;
+        public SOMDoc Wrapper;
 
         [JsonConstructor]
-        public FallbackWrapper(SOMDoc SFunction)
+        public FallbackWrapper(SOMDoc Wrapper)
         {
-            this.SFunction = SFunction;
+            this.Wrapper = Wrapper;
         }
 
         public override string ToString()
-            => SFunction.ToString();
+            => Wrapper.ToString();
 
         protected override bool EquivalentWrapped(FallbackWrapper sd2)
-            => SFunction.Equivalent(sd2);
+            => Wrapper.Equivalent(sd2);
 
         protected override FallbackWrapper MapURIsWrapped(Dictionary<string, string> old_to_new)
-            => new(SFunction.MapURIs(old_to_new));
+            => new(Wrapper.MapURIs(old_to_new));
 
-        protected internal override LambdaExpression GetLambdaExpression(LambdaExpression[] lambda_applicant, LambdaExpression[] lambda_arguments, ParameterExpression[] bound_params)
-            => SFunction.GetLambdaExpression(lambda_applicant, lambda_arguments, bound_params);
+        protected override LambdaExpression _GetLambdaExpression(LambdaExpression[] lambda_applicant, LambdaExpression[] lambda_arguments, ParameterExpression[] bound_params)
+            => Wrapper.GetLambdaExpression(lambda_applicant, lambda_arguments, bound_params);
 
         protected internal override SOMDoc SOMDocType(SOMDoc[] args, FUN.Param[] bound_params)
-            => SFunction.SOMDocType(args, bound_params);
+            => Wrapper.SOMDocType(args, bound_params);
 
         protected internal override Type ToType(Type[] args, (string name, Type type)[] bound_params)
-            => SFunction.ToType(args, bound_params);
+            => Wrapper.ToType(args, bound_params);
 
         public override string[] GetDependentFactIds()
-            => SFunction.GetDependentFactIds();
+            => Wrapper.GetDependentFactIds();
     }
 }
\ No newline at end of file
diff --git a/Assets/Scripts/StageBehaviour.cs b/Assets/Scripts/StageBehaviour.cs
index 92a2d1f028e479ca16aec4ecccc622ce17088023..f0d878fef2da5b4fe38ea9e03493223373e1bed8 100644
--- a/Assets/Scripts/StageBehaviour.cs
+++ b/Assets/Scripts/StageBehaviour.cs
@@ -17,7 +17,7 @@ void Start()
         StageStatic.LoadInitStage(true /*StageStatic.stage.player_record.solved*/, gameObject);
     }
 
-    private List<TriangleFact> GenerateMMTCollider()
+    public static List<TriangleFact> GenerateMMTCollider(GameObject obj = null)
     {
         bool debug = false;
         var t0 = System.DateTime.Now;
@@ -42,7 +42,7 @@ private List<TriangleFact> GenerateMMTCollider()
             }
         }
 
-        if (debug)
+        if (debug && obj != null)
         {
             var t1 = System.DateTime.Now - t0;
             Debug.Log($"{tris.Count} Tris in {t1.Milliseconds}");
@@ -56,7 +56,7 @@ private List<TriangleFact> GenerateMMTCollider()
             mesh.Optimize();
             mesh.RecalculateNormals();
 
-            MeshFilter filter = gameObject.GetComponent<MeshFilter>();
+            MeshFilter filter = obj.GetComponent<MeshFilter>();
             filter.sharedMesh = mesh;
         }
 
diff --git a/Assets/Scripts/Utility/IJSONsavable.cs b/Assets/Scripts/Utility/IJSONsavable.cs
index fb2328200985c903d0b54d5844f50fad8bf81952..af8b8b78b6a4b2b5ec02fe429b09f1055b0614ab 100644
--- a/Assets/Scripts/Utility/IJSONsavable.cs
+++ b/Assets/Scripts/Utility/IJSONsavable.cs
@@ -333,7 +333,7 @@ public sealed class JsonSeparateAttribute : Attribute { }
 
     [AttributeUsage(AttributeTargets.Property | AttributeTargets.Field, AllowMultiple = false)]
     public sealed class JsonAutoPostProcessAttribute : Attribute { }
-    
+
     [AttributeUsage(AttributeTargets.Property | AttributeTargets.Field, AllowMultiple = false)]
     public sealed class JsonAutoPreProcessAttribute : Attribute { }
 
@@ -351,6 +351,7 @@ public static bool WriteToJsonFile(string filePath, object objectToWrite)
         {
             ReferenceLoopHandling = ReferenceLoopHandling.Ignore,
             Formatting = Formatting.Indented,
+            //TypeNameHandling = TypeNameHandling.Auto,
         };
 
         TextWriter writer = null;
@@ -383,12 +384,16 @@ public static bool WriteToJsonFile(string filePath, object objectToWrite)
     {
         payload = default(T);
         TextReader reader = null;
+        var setting = new JsonSerializerSettings()
+        {
+            //TypeNameHandling = TypeNameHandling.Auto,
+        };
 
         try
         {
             reader = new StreamReader(filePath);
             string fileContents = reader.ReadToEnd();
-            payload = JsonConvert.DeserializeObject<T>(fileContents);
+            payload = JsonConvert.DeserializeObject<T>(fileContents, setting);
             return true;
         }
         catch (Exception e)
diff --git a/Assets/Stages/CanonBall 2D.JSON b/Assets/Stages/CanonBall 2D.JSON
index 2599b923608c0c333dfc6d6d4921c0ba24c4bada..e9edb1ab9601769f44936d3a05de6e4cf28bbda9 100644
--- a/Assets/Stages/CanonBall 2D.JSON	
+++ b/Assets/Stages/CanonBall 2D.JSON	
@@ -7,20 +7,20 @@
   "solution": {
     "ValidationSet": [],
     "ExposedSolutionFacts": [
-      "http://mathhub.info/FrameIT/frameworld?DefaultSituationSpace/SituationTheory1?fact4",
-      "http://mathhub.info/FrameIT/frameworld?DefaultSituationSpace/SituationTheory1?fact5",
-      "http://mathhub.info/FrameIT/frameworld?DefaultSituationSpace/SituationTheory1?fact6",
-      "http://mathhub.info/FrameIT/frameworld?DefaultSituationSpace/SituationTheory1?fact7",
-      "http://mathhub.info/FrameIT/frameworld?DefaultSituationSpace/SituationTheory1?fact10",
-      "http://mathhub.info/FrameIT/frameworld?DefaultSituationSpace/SituationTheory1?fact13",
-      "http://mathhub.info/FrameIT/frameworld?DefaultSituationSpace/SituationTheory1?fact16",
-      "http://mathhub.info/FrameIT/frameworld?DefaultSituationSpace/SituationTheory1?fact19",
-      "http://mathhub.info/FrameIT/frameworld?DefaultSituationSpace/SituationTheory1?fact22",
-      "http://mathhub.info/FrameIT/frameworld?DefaultSituationSpace/SituationTheory1?fact25",
-      "http://mathhub.info/FrameIT/frameworld?DefaultSituationSpace/SituationTheory1?fact28",
-      "http://mathhub.info/FrameIT/frameworld?DefaultSituationSpace/SituationTheory1?fact31",
-      "http://mathhub.info/FrameIT/frameworld?DefaultSituationSpace/SituationTheory1?fact34",
-      "http://mathhub.info/FrameIT/frameworld?DefaultSituationSpace/SituationTheory1?fact37",
+      "http://mathhub.info/FrameIT/frameworld?DefaultSituationSpace/SituationTheory1?fact126",
+      "http://mathhub.info/FrameIT/frameworld?DefaultSituationSpace/SituationTheory1?fact127",
+      "http://mathhub.info/FrameIT/frameworld?DefaultSituationSpace/SituationTheory1?fact128",
+      "http://mathhub.info/FrameIT/frameworld?DefaultSituationSpace/SituationTheory1?fact129",
+      "http://mathhub.info/FrameIT/frameworld?DefaultSituationSpace/SituationTheory1?fact132",
+      "http://mathhub.info/FrameIT/frameworld?DefaultSituationSpace/SituationTheory1?fact135",
+      "http://mathhub.info/FrameIT/frameworld?DefaultSituationSpace/SituationTheory1?fact138",
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diff --git a/Assets/Stages/CanonBall 3D.JSON b/Assets/Stages/CanonBall 3D.JSON
index ab670cf76476a7d765addc8a2711db7ec30499f4..83a9ec634ef58e500d50457509eb00645114b3ca 100644
--- a/Assets/Stages/CanonBall 3D.JSON	
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@@ -18586,9 +20728,9 @@
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-        "Label": "Â¥",
+        "Label": "Ì",
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+        "LabelId": 140
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@@ -18717,7 +20859,7 @@
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@@ -18832,9 +20974,9 @@
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+        "Label": "Í",
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@@ -18995,28 +21137,28 @@
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@@ -19108,9 +21250,9 @@
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-        "Label": "§",
+        "Label": "ÃŽ",
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-        "LabelId": 103
+        "LabelId": 142
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@@ -19118,7 +21260,7 @@
           "params": [
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@@ -19239,7 +21381,7 @@
           "params": [
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@@ -19354,9 +21496,9 @@
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         },
-        "Label": "¨",
+        "Label": "Ï",
         "hasCustomLabel": false,
-        "LabelId": 104
+        "LabelId": 143
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@@ -19397,7 +21539,7 @@
               "params": [
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@@ -19517,28 +21659,28 @@
               "params": [
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                     "uri": "http://mathhub.info/MitM/core/geometry?3DGeometry?point"
                   }
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@@ -19630,9 +21772,9 @@
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         },
-        "Label": "©",
+        "Label": "Ð",
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-        "LabelId": 105
+        "LabelId": 144
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@@ -19640,7 +21782,7 @@
           "params": [
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@@ -19761,7 +21903,7 @@
           "params": [
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@@ -19876,9 +22018,9 @@
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         },
-        "Label": "ª",
+        "Label": "Ñ",
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-        "LabelId": 106
+        "LabelId": 145
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@@ -19919,7 +22061,7 @@
               "params": [
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@@ -20039,28 +22181,28 @@
               "params": [
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                   }
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                   }
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@@ -20152,9 +22294,9 @@
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-        "Label": "«",
+        "Label": "Ã’",
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-        "LabelId": 107
+        "LabelId": 146
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       "[t(http://mathhub.info/MitM/Foundation?RealLiterals?real_lit)] => {MakeObjectArray(http://gl.mathhub.info/MMT/LFX/Sigma?Symbols?Tuple(10.28103, 5.194215E-06, 6.846197), http://gl.mathhub.info/MMT/LFX/Sigma?Symbols?Tuple(0.00485768, 0.02577853, -0.03759722), http://gl.mathhub.info/MMT/LFX/Sigma?Symbols?Tuple(0, -9.809999, 0), http://mathhub.info/MitM/Foundation?RealLiterals?plus_real_lit(Variable_(t), http://mathhub.info/MitM/Foundation?RealLiterals?minus_real_lit(6.923773)))}": {
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@@ -20162,7 +22304,7 @@
           "params": [
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@@ -20283,7 +22425,7 @@
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@@ -20398,9 +22540,9 @@
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         },
-        "Label": "¬",
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-        "LabelId": 108
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@@ -20441,7 +22583,7 @@
               "params": [
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                   }
@@ -20561,28 +22703,28 @@
               "params": [
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                   "name": "Pos",
-                  "tp": {
+                  "type": {
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                     "uri": "http://mathhub.info/MitM/core/geometry?3DGeometry?point"
                   }
                 },
                 {
                   "name": "Vel",
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                     "uri": "http://mathhub.info/MitM/core/geometry?3DGeometry?point"
                   }
                 },
                 {
                   "name": "Acc",
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                     "uri": "http://mathhub.info/MitM/core/geometry?3DGeometry?point"
                   }
                 },
                 {
                   "name": "t",
-                  "tp": {
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                     "uri": "http://mathhub.info/MitM/Foundation?RealLiterals?real_lit"
                   }
@@ -20674,9 +22816,9 @@
             }
           ]
         },
-        "Label": "­",
+        "Label": "Ô",
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-        "LabelId": 109
+        "LabelId": 148
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     "name": null,
@@ -20684,7 +22826,8 @@
   },
   "solution_approches": [],
   "AllowedScrolls": [
-    "http://mathhub.info/FrameIT/frameworld?W3DBouncingScroll"
+    "http://mathhub.info/FrameIT/frameworld?W3DBouncingScroll",
+    "http://mathhub.info/FrameIT/frameworld?T3DBouncingScroll"
   ],
   "AllowedGadgets": null,
   "name": "CanonBall 3D",
diff --git a/Assets/StreamingAssets/scrolls.json b/Assets/StreamingAssets/scrolls.json
index c27eebe3d29df2c18cd9863c3f3f0397eb4860f0..8ee1e6e677c762d8c3754468e938014512b21424 100644
--- a/Assets/StreamingAssets/scrolls.json
+++ b/Assets/StreamingAssets/scrolls.json
@@ -22419,7 +22419,41 @@
 			}
 		],
 		"acquiredFacts": []
-	},
+	},	
+	{
+		"ref": "http://mathhub.info/FrameIT/frameworld?T3DBouncingScroll",
+		"label": "T3DBouncingScroll",
+		"description": "Bouncing 3D with Triangles!",
+		"requiredFacts": [
+			{
+				"ref": {
+					"uri": "http://mathhub.info/FrameIT/frameworld?T3DBouncingScroll/Problem?position"
+				},
+				"kind": "general"
+			},{
+				"ref": {
+					"uri": "http://mathhub.info/FrameIT/frameworld?T3DBouncingScroll/Problem?velocity"
+				},
+				"kind": "general"
+			},{
+				"ref": {
+					"uri": "http://mathhub.info/FrameIT/frameworld?T3DBouncingScroll/Problem?g_base"
+				},
+				"kind": "general"
+			},{
+				"ref": {
+					"uri": "http://mathhub.info/FrameIT/frameworld?T3DBouncingScroll/Problem?bounce"
+				},
+				"kind": "general"
+			},{
+				"ref": {
+					"uri": "http://mathhub.info/FrameIT/frameworld?T3DBouncingScroll/Problem?wallsr"
+				},
+				"kind": "general"
+			}
+		],
+		"acquiredFacts": []
+	}, 
 	{
 		"ref": "http://mathhub.info/FrameIT/frameworld?CircleLineAngleScroll",
 		"label": "CircleLineAngleScroll",