We need to fix models that have self-intersections. Some of their triangles intersect with other triangles in the same mesh, which then causes Z-buffer sorting problems in the game engine. The intersecting areas flash on and off when seen from a distance, because the Z precision is low on certain graphics cards.

I'm looking for a way to select intersecting polygons, which I can then fix. I cannot change the vertex count of the mesh, because the meshes are morph targets. I have to use a tool that merely moves the vertices so thay aren't intersecting anymore.

I was thinking that if I could at least select the problem faces, I could apply a Relax modifier to pull them away from one another, or maybe a Push modifier. At last resort, I would go in there and hand-edit them. I just have a bunch of these models to do (4x12 or so) so an automatic solution would be awesome.

It would also be helpful to have a tool that would select long thin triangles, since these cause other problems in-game. I tried the STL Check modifier, but that doesn't select these kinds of problems. Orionflame's PolaX tool does all kinds of other cool selection types, just not self-intersections.

Any insights would be appreciated. BTW, still in max 5.1 if that matters.