Pre-Integrated Skin Shader

Started by Chris_F, Jan 27 2013 10:21 PM

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#1 Chris_F Members - Reputation: 745

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Posted 27 January 2013 - 10:21 PM

I'm trying to implement this shader I saw here, but it is giving me problems.

Here is the lookup texture I generated: link

And when I generate my lighting value by looking up (N.L, 1.0) I expect to get the equivelent of normal lambert diffuse, but instead I get this: link

It doesn't even come close to lighting the entire hemisphere, and I can't figure out why.

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#2 Chris_F Members - Reputation: 745

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Posted 27 January 2013 - 11:10 PM

Ok, I multiplied and offset N.L by 0.5 and it seem to work. I could have sworn I tried that already and got bad results.

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#3 Hodgman Moderators - Reputation: 13558

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Posted 27 January 2013 - 11:11 PM

Seeing that the transition from unlit to lit occurs 50% of the way across your texture, I'd guess that your tex-coord should take the -1 to +1 range of N.L into account -- e.g. (N.L*0.5+0.5, 1.0)

Edit: ninja'd me

Edited by Hodgman, 27 January 2013 - 11:11 PM.

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