A free shader on Gumroad by Lee Devonald.
This shader is said to mimic the Marmoset Viewer channel display feature, allowing you to post detailed breakdowns of your materials in high resolution.
One note i would make:
Local Reflections will show up as they are a screenspace effect, so if you’re getting an almost fresnel like effect, make sure to disable that.
Currently using Skin or Microfibre diffuse settings will cause some “bleed” into gloss/reflectivity. I’m working on removing that, but it won’t be easy as i don’t have access to certain things.
Make sure to check out the artist’s works here.