QuadMesh is still displayed wrong

@jeff
Check this out: If I contour a quad mesh then it often “blocks” the contour lines since OpenGL is interpreting the mesh division differently than “Rhino”. If I triangulate the mesh then it displays correctly since triangulation follows the same logic as the rest of Rhino.

Can you take a look at it? (Just make some quad meshes and contour them and you’ll see the issue)

image

I think this will go on @DavidEranen’s list.