Max's Diffusion slot in the raytrace material merely darkens the map in Max's Diffuse slot. Here's what the help file says (yeah, not much). I'd love to see what other apps say in their help files. [ QUOTE ] Diffusion Mapping The Diffusion map component lets you apply an additional, second texture to modify the Diffuse…
indeed. the problem comes from 3ds max using the term diffuse map for what the rest of the world calls a color map. in max's raytrace material, you can find the diffusion map slot, that is probably, what leigh is talking about when she's referring to a diffuse map (do recall her old cgtalk article only very vaguely but…
Leigh is wrong, IMHO. She seems to have learned about real-world light by examining the way CG lighting has been broken down into lighting elements. But CG lighting is really just a bunch of hacks, optimizations written for performance reasons, basically CG lighting has been written to render faster than its real-world…
in max / simple Cg world: diffuse is surface with normal at maximum 90° to the light. beyond that (backfacing light) is ambient. so in opengl or whatever you will find two color values you can tweak for light and material: diffuse/ambient. which will be picked based on normal/light relationship. however as normally those…