I wonder how the ideal diffuse (Lambertian) surfaces are defined in
POVRAY. The 'obvious' way seemed to be to define a finish
with diffuse=1, but what about the brilliance parameter --
does Lambertian model correspond to some particular value of brilliance?
Thanks for any suggestion.
>I wonder how the ideal diffuse (Lambertian) surfaces are defined in>POVRAY. The 'obvious' way seemed to be to define a finish>with diffuse=1, but what about the brilliance parameter -->does Lambertian model correspond to some particular value of brilliance?
Diffuse reflectance in POV-Ray depends on pigment and diffuse value. I
suggest to set diffuse=1 and set diffuse reflectances to color pigment.
Then it is easy to add reflection to surface reducing diffuse value using
same pigment. Lambertian model use default brilliance value.
Matti
>Diffuse reflectance in POV-Ray depends on pigment and diffuse value. I>suggest to set diffuse=1 and set diffuse reflectances to color pigment.>Then it is easy to add reflection to surface reducing diffuse value using>same pigment. Lambertian model use default brilliance value.
Thanks, it seems that it works. I also checked directly in the code
and found that diffuse intensity is ~ (N.L)^brilliance.
Ondrej
