>The pigment of the surface is added to the reflected colour. So rgb
><1,0,0> reflection 1 is not a pure red mirror. A pure red mirror would
>be rgb <0,0,0> reflection <1,0,0>


I thought it was the fact that the surface absorbs all other frequencies
than red, and all red incoming light is reflected. I believe that it is the
color model that makes the topic a bit fuzzy. If one could model the light
as a collection of frequencies rather than only <r, g, b>, we could get
simpler modelling. But I am not sure.

As for the secont question: Yes, light is reflected more perfectly at acute
incoming angles. I believe it is very difficult to model accurately. You
would have to supply several parameters, like the reflection rate when the
incoming ray is perpendicular to the surface normal (this would never
happen, though...), the rate of reflection when the incoming ray is
parallell to the surface normal, and so forth. That is, if it is not a clear
relation between the values that are "universal." I have thinked of it,
myself, but I haven't come across any papers on the phenomena. Anyone?

Post a reply to this message