with Cycles?
I recall I did pretty same looking things with AO shader in mental ray , decades ago in Lightwave too. just by playing with inverting normals , stretching vectors and multiplying them by some noise.
Have anyone managed to recreate this with AO shader in Cycles?
This link works just fine as well as the rest of gumroad. For some uncertain reason Norton finds what it calls info stealing advertisement code on the page of interest. I have no idea how reliable it may be. Or maybe something innocent at all.
It can be viewed as information theft because gumroad requires an email, but it’s hard to understand if you’re blocked from accessing a specific page. If you’re nervous, don’t connect.
Please refer to the link I uploaded for the first time and make your own materials