I haven’t seen it posted here before so I just thought I would mention it now; ATI has a couple great apps for experimenting with multitexturing in both OpenGL and D3D. The GL app is “OGLMulTex” and can be found at:
http://www.ati.com/na/pages/resource_centre/dev_rel/sdk/rage128sdk_1-4/Multex/OGLMultex.html
It requires the GL_ARB_multitexture and GL_EXT_texture_env_combine extensions to run (most new cards seem to support these). Definately worth checking out!
[This message has been edited by DJ Tricky S (edited 08-23-2000).]