POV-Ray : Newsgroups : povray.unofficial.patches : Importance sampling of phong brdf : Re: Importance sampling of phong brdf Server Time
1 Jul 2024 02:57:49 EDT (-0400)
  Re: Importance sampling of phong brdf  
From: Christoph Hormann
Date: 14 Apr 2003 15:18:23
Message: <3E9B097E.E468B245@gmx.de>
Mael wrote:
> 
> Hello,
> 
> I've tried to write a patch to do importance sampling of the phong brdf (the
> modified phong brdf actually). The patch uses the phong and phong_size of
> finish{} to compute highlights even in radiosity lighted only parts of the
> image (If there are real light sources then the highlight is the phong
> contribution of those lights source + the contribution of the sampled phong
> brdf)

That looks very interesting, i have some troubles understanding how it
works though.  The phong model needs the light direction, how do you
determine it with radiosity lighting?

Concerning practical usage - it would be interesting to see a version with
reflective finish in comparison (which will also show highlights with
hdri).

Christoph

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