Proper node setup for use with Principled BSDF shader, as given by @moony.
Render samples:
without (standard principled shader roughness)
with (principled shader with the addition of MicroRoughness node tree feeding into roughness channel.
Proper node setup for use with Principled BSDF shader, as given by @moony.
Render samples:
without (standard principled shader roughness)
with (principled shader with the addition of MicroRoughness node tree feeding into roughness channel.