What is so advanced or hard about working with cubemaps? It’s no more than 6 textures setup together to make a cube. Wow. I’m quite sure the other advanced graphics coders in here would agree with me. Now maybe if you were doing some advanced lighting algorithm using them and had a quesiton about that. But just binding them is quite beginner. I usually don’t consider things that are explained in the redbook or any other learn opengl book advanced. Maybe a few things in the redbook can be considered advanced but most things are basic opengl.