Hidden Line Removal
Whenever I need to do this I make a copy of the mesh then scale it down very
slightly and assign it a solid black material and the other outer mesh I give
the wire frame tex. On something like the plane you may need to select groups
of vertices and scale these down independantly, otherwise the black object will
cut through the wireframe. Basicly try to indentify all the convex groups on
the object, then select these, scale down then next group etc.It wouldn't be
too much trouble to write a program that can find the normal for each vert and
scale it along that axis and get a perfect fit, in fact there probably is one.
———–Will