[Radiance-general] METAL material values

[Lars O. Grobe]

Hi Adriana.
> I'm assuming that this material can best described as follows:
>
> void metal metal_1
> 0
> 0
> 5  .95  .95  .95  .90 .10
Sorry, you are close, but this would give a strange result. the .90 is 
fine and tells radiance that 90% is specular, 10% is diffuse 
reflectance. The .10 does not work. Roughness is not the same as diffuse 
reflection. Diffuse reflection is already defined as the difference 
betwenn specular reflection and 1. Roughness is more or less a visual 
effect simulating uneveness of a surface. Set it to zero for your 
application.

The same for your second example, set the rgb values to the total 
reflection, define the specular component (which is low in the second 
example), so the rest is diffuse.

Good luck, Lars.