Remove Material Diffuse Color in Shadows?

[Rollk1]

Is it possible to have the diffuse color not show in shadows? For example I have a green item and the shadows have a
predominately green hue whereas I'd like the shadows to be monochrome. The material type is plastic and the diffuse setting is the only one that resolves it, but then obviously the item changes color. Any work around?

[RRIS]

Self-shadows, or cast shadows on the ground? If the latter, disable global illumination.. only other option I can think of is render in passes and desaturate the shadow pass (but I've never tried this myself.. worth a shot?)

[mattjgerard]

Self-shadows, or cast shadows on the ground? If the latter, disable global illumination.. only other option I can think of is render in passes and desaturate the shadow pass (but I've never tried this myself.. worth a shot?)

I do this with colored reflections all the time with our LED products. They want the color saturated (bright) but not to reflect to much on surrounding objects (not physically correct, but hey I'm just the 3D guy)

[Rollk1]

Figured it out, I forgot there's a "ground illumination" setting in lighting

[DMerz III]

Ground Illumination is probably what you're looking for, you could always disable the global illumination as well but that might make the rest of your object suffer a loss in realism.