"Principled v2" feedback/discussion thread

[LudvikKoutny]

Yes, exactly. The correct setup exists but is extremely clunky. I pointed it over 6 years ago:

Diffuse translucency way too difficult to set up in Cycles

Hi, In the majority of cases of 3D foliage, translucent surfaces such as grass blades, tree leaves and so on are modeled as a thin, one sided polygonal surface without any thickness, due to a sheer amount of geometry required to achieve foliage of sufficient density. It’s very rare to see clumps of grass or tree leaves modeled with actual leaf thickness, because it’d often bring viewport performance down to a crawl due to extreme polycounts. Because of this limitation, it is not possible to ut…

In those 6 years, we got all sorts of gimmicks in the Principled shader, but thin translucency, which appears in nearly every scene (foliage, thin fabric, paper) is still not implemented.

Overwhelming majority of asset packs for Blender released in the meanwhile do the thin translucency setup wrong, and it’s hard to blame them given how complicated the correct setup is.