diff --git a/Platformer/PlatformWindow.cs b/Platformer/PlatformWindow.cs
index 49f7257..a998de1 100644
--- a/Platformer/PlatformWindow.cs
+++ b/Platformer/PlatformWindow.cs
@@ -112,7 +112,7 @@ namespace Platformer
          GL.BindVertexArray(_polyVao);
 
          GL.BindBuffer(BufferTarget.ElementArrayBuffer, _pEdges);
-         GL.Uniform3(_render.UnifLoc("color"), .1f, .1f, .9f);
+         GL.Uniform3(_render.UnifLoc("color"), .1f, .1f, .6f);
          GL.DrawElements(BeginMode.Lines, _pEdges.Count, DrawElementsType.UnsignedInt, 0);
 
          GL.Flush();
diff --git a/Platformer/shaders/intersect.comp b/Platformer/shaders/intersect.comp
index 78c0094..3b97030 100644
--- a/Platformer/shaders/intersect.comp
+++ b/Platformer/shaders/intersect.comp
@@ -15,11 +15,41 @@ layout(std430, binding=2) buffer PolyVerts
     vec4 polyVerts[];
 };
 
-layout(std430, binding=3) buffer EdgeInds
+layout(std430, binding=3) buffer PolyEdges
 {
-    uint edgeInds[];
+    uint polyEdges[];
 };
 
+uniform PlaneMats
+{
+    mat4 tform;
+};
+
+layout(local_size_x = 128, local_size_y = 1, local_size_z = 1) in;
+
 void main () {
+    uint ti0 = gl_GlobalInvocationID.x * 4;
+    uint pv0 = gl_GlobalInvocationID.x * 4;
+    uint pe0 = gl_GlobalInvocationID.x * 8;
     
+    uint ii = 0;
+    uint vv = 0;
+    
+//    polyVerts[pv0 + vv++] = vec4(-1,0,0,1);
+//    polyVerts[pv0 + vv++] = vec4(1,0,0,1);
+//
+//    polyEdges[pe0 + ii++] = pv0 + 0;
+//    polyEdges[pe0 + ii++] = pv0 + 1;
+    
+    for(uint i = 1; i < 4; i++)
+    {
+        polyVerts[pv0 + vv++] = (tetraVerts[ti0] + tetraVerts[ti0 + i]) / 2;
+    }
+
+    polyEdges[pe0 + ii++] = pv0 + 0;
+    polyEdges[pe0 + ii++] = pv0 + 1;
+    polyEdges[pe0 + ii++] = pv0 + 1;
+    polyEdges[pe0 + ii++] = pv0 + 2;
+    polyEdges[pe0 + ii++] = pv0 + 2;
+    polyEdges[pe0 + ii++] = pv0 + 0;
 }
\ No newline at end of file