clipka <ano### [at] anonymousorg> wrote:
> It should be noted that unbiased renderers typically don't take you much 
> further than POV-Ray with radiosity and photons enabled

  I wouldn't say that. As said, if the unbiased renderer supports defining
BRDF functions (and possibly other similar functions, such as BSDF's for
scattering, BTDF's for transmittance, and so on), it allows for a much
more accurate representation of physical surfaces, far beyond the simplistic
phong lighting model supported by POV-Ray (even if you enhance it with
diffuse inter-reflection of light between surfaces, photon mapping and
"faked" dispersion).

  Naturally there necessarily are limits to what even an unbiased rendered
with all those features can do (for example, it may be very difficult to
simulate interference in a physically accurate way, especially since
interference is affected by quantum effects that go well beyond what a
simple renderer supports and can simulate). However, I think that saying
"they don't take you much further than POV-Ray" is an exaggeration.

-- 
                                                          - Warp

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