I’m tying to figure out what is the best way to mix shaders.
One way is to creade one BSDF for i.e. shiny metal, another one for rust and then just use a mask to distribute them.
Another way (the propper way, apparently) is to use just one BSDF while all textures should be mixed in advance and the result fed to the appropriate slots (colour, roughness…).
So I made a little experiment. I have two Susannes, each with different material created as per above. To me, the results are identical. Admitedly, it’s a simple material, I’m mixing only colours, but I assume the same case can be made for any other parameter?
My question is, is there any significant down side of either of the methods? Is there a case where there would be a noticeable difference in the result? Is there a performance difference?
One version of material
Both next to each other