Say I have a Mix shader and I have a texture for a Diffuse BSDF and Glossy BSDF and I want to use the alpha channel of one image to determine the amount of “mix” between the two.
If I just connect the alpha output to fac in the mix shader then I don’t get the results I want. Whether the alpha channel is all white or all black, it doesn’t seem to make any difference. Basically it seems like I need to normalize the alpha values to something between 0 and 1 before they get input to fac in the mix shader, but I can’t seem to figure out how to do that.
I tried a math node set to divide by 255 but that didn’t do it.
Is there any way to debug what the output of various nodes actually is in numerical terms? Other than the obvious color coding, I’m not sure what sort of outputs are compatible with what sort of inputs. I especially don’t understand what “vector” does.