check this page, it shows some cases:
Isn’t this something that should be fixed by the 3d modeler since they went crazy with the 3d hair planes?
This looks like a simple fix in 3d /maya/blender.
the ones on that page show some hair that isn’t too complex. the hair from the robot dude in the paragon video would have these glitches all over the place
Hmmm, I see.
3D has a conform brush, if you use it properly you can avoid intersections.