2012

Table Of Contents
Moving an object so its faces no longer occupy the same plane as another
object will fix this situation.
Twisted Faces
Faces that self-overlap due to a 180-degree twist can also produce ambiguous
results, because the normal for the face is not well defined.
In the following example, artifacts appear where the face is twisted due to
crossing the second and third corner points.
814 | Chapter 13 Render Drawings