Linear * 2.0 - 1.0

Graphics Shaders & Materials
1

Hey,

I have a matcap shader that works in gamma space but not in linear space.
The problem is that doing mainTex + ((matCapTexture * 2.0) - 1.0); doesn’t give the right result in linear space. Only values greater than 0.5 shows.

I tried doing a saturate and a pow(matCapTexure,2.2) but it still isn’t the right result.

What can I do?

2

gamma to linear is pow(rgb, 1/2.2) =)

3

yes I also tried that, but it’s not working gives me the same result

4

Ah. Try fiddling with the bypass sRGB sampling option in the texture importer (under advanced?). If it’s not this or the pow, the problem should be somewhere else.

5

ahhh yes that’s it!
thanks! :smile: