(lines-closer CAM-ID DIST)
- Draw lines (including edges) closer to the camera than polygons
by DIST / 10^5 of the Z-buffer range. DIST = 3.0 by default.
If DIST is too small, a line lying on a surface may be
dotted or invisible, depending on the viewpoint.
If DIST is too large, lines may appear in front of surfaces
that they actually lie behind. Good values for DIST vary with
the scene, viewpoint, and distance between near and far clipping
planes. This feature is a kludge, but can be helpful.