specualr color

hula

hey all,
quick question.
generally when do you use color in a spec map?
Just in metal? I am doing stone and grass and was curious if i should add color to it?

thanks !

cpcp

Ryan Clark

You might use colored specularity for nonmetallic things.

For instance, if you want white highlights, try subtracting your diffuse color from your specmap.

For example, if you have green grass and you want white highlights, try experimenting with a magenta-tinted specmap. Because green + magenta = white.

If you're using CrazyBump, just drag the specmap's "metallic color" slider to a negative value, and adjust until your highlights have the desired color.

Eric Chadwick

Ryan's tips are good. Also there's a lot of specular info in the Archives:
specular maps and normal maps