The shader is very simple. Using the Cycles root plus Principled BSDF means no preview, but the results are more than worth it in my opinion. I had a thread with a bunch of examples, but that seems to have disappeared, so I’ll add my notes here (note that I am perfectly capable of making mistakes!). First, there were only the two maps with this sample, which is why I’m using a normal map (bump is easier to make, set up and adjust).

Specular in Superfly is base reflectance, or direct reflection, or f0; with this node 0-2 are mapped to to 0-16%. Using 0.25 here means 2% base reflectance which seems to work well. I’ve never used a spec map in Superfly yet, they aren’t needed. (NB. with the PBR Metal/Rough workflow as used in apps like Substance Painter and many others, the default would be 0.5 which would be 4% for all non-metals.)

As bagginsbill says, with a good bump a roughness map doesn’t really seem to matter that much (not the case with most materials though, they are important as they define surface relief at a smaller scale than bump or normal maps).

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