Hi Fabrice, finally I had the time to work on my discoball-project again...
Thanks a lot for your help. Rotating the three normals did the trick - almost. After some trail&error I found out, that I have to rotate the value "nn" as well. So, I added: nn.rotate(tri.faceVO.face.normal, t); Now it works fine! But I have another - my last, I swear - question: As the Material draws Triangles to the sphere, the single "rectangles" (mirrors) which make up the mirror ball look divided (what they actually are, because they are composed of two triangles). Is there a way to have the two triangles, that make up a rectangle, render in a way that you don't see, it is composed by two triangles? In BitmapMaterial.as I saw a method renderRect(). Is that something I need? It sounds like... ;) - but I have no clue how to adapt that to the DiscoballMaterial... What would be the way to go? thanks again and greetz, spog
