(2020-03-04, 12:59)Philippe Hurbain Wrote: Yes, it occurs whenever edge lines are "too close" of external surface. Sometimes it can even be seen on regular parts when unzoomed enough, see for example this panel preview: https://www.ldraw.org/parts/official-par...rtid=62531
This is caused (at least in LDCad) by OpenGL's GL_POLYGON_OFFSET_FILL which pushes triangles and quads slightly back so lines are guaranteed to be on top.
LDCad currently uses glPolygonOffset(1.0, 1.0) but its effect differs per driver implementation because those parameters are only hints to the implementation.
I could make the parameters options in main.cfg if people would like to tweak them.