using gl_ext_texture_env_add and gl_ext_texture_env_combine

Hi,
i need info utorials how to use these extensions:
gl_ext_texture_env_add and ext_texture_env_combine
i read the extension registry on this site and it didn’t help me to understand how to use them…
Post me a link to tutorial or something like that…

http://www.paulsprojects.net/tutorials/simplebump/simplebump.html

How can you be sure that you need these extensions if you do not completely understand them? They are a little outdated anyway, on modern hardware, most people would use vertex/fragment programs instead.

Well, i looked at the link you posted me and it was about using cube maps not extensions i asked…

Yes i know that these extensions are outdated, but i want to use them…

Here, try these:
http://developer.nvidia.com/page/opengl.html

In particular, try the GL_Bump demo, it covers most of the combiner concepts. There are other combiner demos there too, but I forget which ones.