[Radiance-general] Color definition in Plastic material

[Xiaoming Yang]

Hi,

I have a rather basic question about color definition for plastic material and hope someone could help me.

mod plastic id
0
0
5 red green blue spec rough

Does the red, green and blue define diffuse reflection or total reflection?

For example, if a material reflect 40% light diffusely and 10% specularly, is it correct to define this material as:
Void plastic testMaterial
0
0
5 0.4 0.4 0.4 0.1 0

I was checking with the spectrum data from SUTD http://www.lighting-materials.com/materials/648

And it seems they are using the other approach which defines R G and B with total reflection and the material will be
Void plastic testMaterial
0
0
5 0.5 0.5 0.5 0.1 0

Xiaoming


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