Normal maps?

[M/\dm/\n]

I've a problem, if I want to use bumpmaps and other nice looking stuff I need normal maps, but I don't know how to build them. I think I could import BMP for ex. and use RGB values per pixel as 3 vector coords, but I don't know how to draw the normal map. I could calculate different RGB values per angles, but that sounds crazy! Maybe someone knows beter way to create normal maps.
By the way, what's about normalization?

[What3v3r]

Hi! Stay calm boy! http://www.opengl.org/discussion_boards/ubb/smile.gif Go to www.nvidia.com (http://www.nvidia.com) there you have a plugin for Photoshop to generate normal maps from textures. Not so hard, hein ? http://www.opengl.org/discussion_boards/ubb/smile.gif

Hope this helps.
Bye

[M/\dm/\n]

Thanks, there was also comand line generator which seems more practical to me.

[dawn]

Look at Tenebrae's (that q1 mod) sources.