Sorry, that's my fault. Yes, indeed, I deleted the original question because the problem has a completely different reason I think. I added some more glGerError() functions and discovered an error during openGl drawing process which is called GL_INVALID_OPERATION. The 2d and 3d textures are fine, the only remaining problem is the described one in the new stackoverflow question you mentioned. I removed the ocio code to reduce it to a minimum code. So the problem is simply my insufficient knowledge of OpenGL I suppose.