Material mapping and interreflection calcu lation

I think carsten may tell something about...
check his paper at the 1st radiance international workshop:


PS carsten, what about PF? ¦8¬)


-----Original Message-----
From: Iván Pajares Sánchez [mailto:[email protected]]
Sent: 27 May 2004 11:55
To: [email protected]
Subject: [Radiance-general] Material mapping and interreflection

Hi list,

I have an idea I don't really now 1. If it is feasible 2. If it is, how
to apply it...
Allow me to explain:

When it comes to mapping material colors or photograph and textures to a
3D geometry funny things start to happen in certain situations, i.e. a
noise pattern used to simulate a fabric will create ambient rays with
different colors & intensities depending on the point in the map where
they bounce. For accurate illuminance measuring, though, we could get
away with the mean reflection / trasmisivity of the surface (as long as
the scale of the perturbation is not big enough), so: is there a way to
tell RADIANCE to use those mean values for the interreflection
calculation and after that just stick the map & texture on the surface
for 'slickness' purposes only?
I know one can play with sample interpolation, but still in certain
situations big color variations happen. Does this make any sense to any
of you?


Ivan Pajares

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