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Calculate a normal maps blue channel out of red and green?
Calculate a normal maps blue channel out of red and green?
Hey, i have a couple of models that use 2 channel normal maps and have other data embedded into the blue and alpha channel. Is there a way to use 2 channel normal maps and calculate the Z value using the red and green channel?
If so how heavy would this be in terms of rendertime compared to simply using a value of 1 for the blue channel?
It will not affect render time. you are just routing some channels around in a different way.
Not entirely sure I understand, but you can split out the .x and .y channels do some addition of them, average, multiply them, do "anything" then add that to a vector in the 3rd slot, and pipe x and y to the first 2.
Since its max, maybe send over a plane with the setup you got and we can try look at it?
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