CGTalk - Gamma with Physical Sun, SSS, Photographic Exposure

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chadmv

05-29-2008, 06:41 AM

Forgive me if this is a stupid question. But I'm using Physical Sun/Sky with Fast Skin and Photographic Exposure Control (mia_exposure_photographic). I set the rgb conversion values to .318 and the gamma on the exposure control to 1.8. The image comes up really dull.

What am I missing here?

Thanks!

http://www.chadvernon.com/files/sss_head.jpg

Fathom

05-29-2008, 11:35 AM

http://www.highend3d.com/3dsmax/tutorials/rendering/vray/Linear-Workflow-in-3DSMax-and-VRay-147.html

royterr

05-29-2008, 09:16 PM

i remember there was something weird when using a sss shader and mia_physical_sky, you had to tick an option in the sss shader, i don`t recal exactly what....
be sure thow to degamma your textures with the degamma node.

chadmv

05-30-2008, 04:56 AM

Yeah, I've checked on "Include Indirect Lighting" on the lmap node and check off "Screen Composite" on the sss shader.

Thanks for that article. I had to turn the gamma in the mental ray tab down to .555 = 1/1.8 and change my frame buffer to 3x8 float. I also had to bump up the physical sun multiply to 4, which I thought was a bit strange.

http://www.chadvernon.com/files/sss_head2.jpg

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