It's very hard to tell from the screen shots but to me it looks like you are picking up reflections or specular highlights at the edges of the transparent tetrahedrons
What material are you using for the tetrahedrons? If the object is to make them disappear you have have to crank down the spec and reflection (these can be keyed). But as anyone on this forum would tell you I am no rendering guru.
"If I have seen further it is by standing on the shoulders of giants." Sir Isaac Newton, 1675
Last edited by ctbram; 04-12-2010 at 03:45 PM.