[Radiance-general] Material mapping and interreflection calcu lation

[Giulio Antonutto]

I think carsten may tell something about... 
check his paper at the 1st radiance international workshop:
http://www.radiance-online.org/radiance-workshop1/cd/Bauer/index.html


cheers,
giulio


PS carsten, what about PF?  ¦8¬)


-----Original Message-----
From: Iván Pajares Sánchez [mailto:defunkt at pobox.com]
Sent: 27 May 2004 11:55
To: radiance-general at radiance-online.org
Subject: [Radiance-general] Material mapping and interreflection
calculation


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?

Thanks,

Ivan Pajares

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