I created a sphere with 3DSMax with a texture, I opened it with 3D Exploration and converted it in C++ OpenGL code. I converted all the parameters (textures, normales, materials, ...). But when I run the OpenGL program with this code, it get 1 frame per second approximately. What the heck? I tried to resolve the problem, I have found a way: don''t convert the materials, but I lose the texture. I mapped the sphere manually with C++ code, but the texture is upside down when I run the program. Anyone has a solution to my problem or can help me? Thanks!!!