I tried setting up the materials as two separate material functions blended as material layers (matlayerblend_standard) and got the same issue. If there were a workflow for blending materials it would be that (each of the material functions are unique materials). Hopefully a new blend mode emerges if it's possible.
Not really true at all. Roughness is essentially a gloss map, not a spec map. It determines how sharp or soft your specular reflection is. The details don't have to match up with your normals necessarily. Some of them can, but a good gloss/roughness map has details in it that aren't a part of the diffuse, normal, or spec.…
These values are for Specular map, but if you use Metalness, you don't have to worry about specular levels of the non-metal materials. And you put values for metal materials in your Albedo map.
For cracked leather metalness would be 0(pure black), because it's not metal. Albedo should be brighter than you expect. Everything else with the material you do in roughness/gloss map. If there are stains or grunge on the material you need to add that to albedo/metalness/roughness too.
@ Count Vader - The values you see for roughness/ spec are measured from real world materials. Those values should be what you are using for your maps. You can toy with them if you want different visuals, but that wouldn't technically be correct. You can either visually decide if it looks right or pull from real world…
I just tested the single shader vs using material layers and I got the same results, but I'm almost positive the issue is that rather than calculating the two materials separately and blending those values they're blending the inputs as well. Notice in Count Vader's image how the adjacent colors for both the materials are…
Yeah just to reiterate if I wasn't clear, for pretty much all your materials you're going to want to stick to either non-metal or metal, 0 or 1. It's a binary thing for the most part. This isn't to say it's not possible to do something in between, but the material you'd be representing would have unusual qualities. For…