Hallo; i am working on a magig cube and finally i want to add enviroment mapping. as it is a cube, the simple methode by just using the vertex normals wont work(flat faces), because they all have the same direction and so they point to the same uv at env_map. so i use the common spherical uv technique. i have a vector V, from my origin(0,0,- focus) to the vertexpoint. V is not a unitvec. Further i have my vertexnormal N(unit vec) and the reflecting vector R(no unit vec), calculated by: R = V - (2*N*V)*N; Then i get a m = 2 * sqrt(r.x² + r.y² + (r.z+1)²) now i have the u,v coordinate: u = (r.x/m + 0.5) * envmap_width; v = (r.y/m + 0.5) * envmap_heigth; it works fine for the case that there is no rotation, but comes only a z-rotating into play erverything is distorted. everything looks like a broken mirror. i cant show u an image, but i hope that some did allready implement something like this or that and can help me. thanks