CGTalk - Linear Displacement

blazelet

07-10-2010, 06:34 PM

I apologize if this has already been answered somewhere, I've been trying to search but haven't found a solution yet.

I have a situation where I am gamma correcting my renders by using a .4545 gamma in the framebuffer. I now need to invert the gamma on my displacement node to keep it uncorrected but I am not sure how to do that ...

Currently I have my displacement texture feeding into a bump2d node as a 'Tangent Space Normal' which goes into a misss_set_normal node which then plugs into my SSS shader.

Any help would be appreciated.

Ryan

TaKIKO

07-11-2010, 01:23 AM

disregard****

blazelet

07-15-2010, 05:33 PM

Just in case anyone else runs into this problem, I couldn't figure out how to gamma correct the displacement going through the misss_set_normal node into an SSS shader in Maya ... any place I could put a gamma correction node either wouldnt work or the available connections were inadequate.

When I ended up doing was opening my displacement map in Photoshop and did gamma correction there, saved it out and used the gamma corrected disp map in Mental Ray as usual.

I still have some testing to do to make sure I'm not losing anything by this method but so far everything seems ok - all the obvious problems I was having doing it in seperate render layers are gone.

Thanks,

Ryan

illbrat

07-15-2010, 06:43 PM

You only need to gamma correct textures that are to be used for color. Displacement textures are for data only, no color information.

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07-15-2010, 06:43 PM

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