RE: [Openexr-devel] HDRI usage questions...

[Nick Porcino]

It is kind of off topic, since the problem is not inherent to OpenEXR, but 
anyway, I too am interested in the answer to this question.

We are using the Maya + Mental Ray combination to produce our HDR images.

One problem in particular that we are seeing is due to the use of specularity 
in the lighting model. 

Specularity isn't properly a reflection of real light sources, but rather a 
camera space approximation to reflected light sources in the environment.

As a result when we merge the images together, we are finding that there are 
very obvious seams since the camera matrices have been set up differently to 
generate the various views. There may be other problems leading to those seams, 
but we are still researching. I'm expecting we'll see similar problems with 
anisotropic shaders, spherical environment maps, and so on.

-nick


-----Original Message-----
From: Bruno Ripa [mailto:address@hidden
Sent: Friday, July 11, 2003 6:00 AM
To: address@hidden
Subject: [Openexr-devel] HDRI usage questions...


I need to merge many hdri images information to reproduce a very very big
environment light scene....are there many docs on the net regarding this
topic ?

Thank you !



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