diff --git a/Tetrahedrons/Gl4Window.cs b/Tetrahedrons/Gl4Window.cs
index edc3ceb..8407a0e 100644
--- a/Tetrahedrons/Gl4Window.cs
+++ b/Tetrahedrons/Gl4Window.cs
@@ -186,7 +186,7 @@ namespace Tetrahedrons
 
          _transView.Projection = Matrix4.CreateOrthographic(w, w * Height / Width, -w, w);
          _transView.View = Matrix4.LookAt(Vector3.Zero, -new Vector3(1, -1, 1), Vector3.UnitZ);
-         _transView.Model = Matrix4.CreateRotationZ(_t / 10);
+         _transView.Model = Matrix4.CreateRotationZ(_t / 3);
 
          _bufTransView = GL.GenBuffer();
          GL.BindBuffer(BufferTarget.UniformBuffer, _bufTransView);
@@ -196,11 +196,13 @@ namespace Tetrahedrons
 
          _transPent.Pivot.W = .3f;
 //         _transPent.Pivot.W = (float) (Math.Sin(_t) * .6);
+         var a = 3f;
+         a = _t;
          _transPent.Rotate = new Matrix4(
             1, 0, 0, 0,
             0, 1, 0, 0,
-            0, 0, (float) Math.Sin(_t / 5), (float) -Math.Cos(_t / 5),
-            0, 0, (float) Math.Cos(_t / 5), (float) Math.Sin(_t / 5));
+            0, 0, (float) Math.Sin(a / 5), (float) -Math.Cos(a / 5),
+            0, 0, (float) Math.Cos(a / 5), (float) Math.Sin(a / 5));
 
          _bufTransPent = GL.GenBuffer();
          GL.BindBuffer(BufferTarget.ShaderStorageBuffer, _bufTransPent);
diff --git a/Tetrahedrons/Shaders/intersect.comp b/Tetrahedrons/Shaders/intersect.comp
index 0b5477b..e369be4 100644
--- a/Tetrahedrons/Shaders/intersect.comp
+++ b/Tetrahedrons/Shaders/intersect.comp
@@ -66,21 +66,48 @@ void main() {
     
     if (vi == 4)  // points form a tetrahedron
     {
-//        for(int i =     0; i < 5; i++)
-//        for(int j = i + 1; j < 5; j++)
-//        for(int k = j + 1; j < 5; j++)
-//        {
-//            hullInds[hi0 + ii++] = i;
-//            hullInds[hi0 + ii++] = j;
-//            hullInds[hi0 + ii++] = k;
-//        }
+        for(int i =     0; i < 4; i++)
+        for(int j = i + 1; j < 4; j++)
+        for(int k = j + 1; k < 4; k++)
+        {
+            hullInds[hi0 + ii++] = i;
+            hullInds[hi0 + ii++] = j;
+            hullInds[hi0 + ii++] = k;
+        }
     }
     else if (vi == 6) {  // points form a triangular prism
-        for(int i = 0; i < 6; i++)
-        for(int j = i + 1; j < 6; j++)
-        for(int k = j + 1; k < 6; k++)
+        for(int f = 0; f < 5; f++)
         {
+            for(int i = 0; i < 6; i++)
+            for(int j = i + 1; j < 6; j++)
+            for(int k = j + 1; k < 6; k++)
+            if (
+                (hullInds[hi0 + 23 - 2 * i] == f ||
+                 hullInds[hi0 + 22 - 2 * i] == f) &&
+                (hullInds[hi0 + 23 - 2 * j] == f ||
+                 hullInds[hi0 + 22 - 2 * j] == f) &&
+                (hullInds[hi0 + 23 - 2 * k] == f ||
+                 hullInds[hi0 + 22 - 2 * k] == f))
+            {
+                hullInds[hi0 + ii++] = hv0 + i;
+                hullInds[hi0 + ii++] = hv0 + j;
+                hullInds[hi0 + ii++] = hv0 + k;
+            }
+        }
+        
+        for (int i = 0; i < 3; i++)
+        {
+            int a = hullInds[hi0 + i];
+            int b = hullInds[hi0 + (1 + i) % 3];
+            int c = hullInds[hi0 + 3 + i];
+            int d = hullInds[hi0 + 3 + (1 + i) % 3];
             
+            hullInds[hi0 + ii++] = c;
+            hullInds[hi0 + ii++] = a;
+            hullInds[hi0 + ii++] = b;
+            hullInds[hi0 + ii++] = b;
+            hullInds[hi0 + ii++] = d;
+            hullInds[hi0 + ii++] = c;
         }
     }