Hi,
I create a simple scene with directional light and Lumen GI turn off (lumen difference between 5.1/5.2 is another nightmare, BTW). Also the shader is simplified to show the case. Keep eyes on the shadow under the nose. Start with thickness = 0, all good. As the thickness goes up, the shadow from 5.2 substrate fades out very quickly. I would say the thickness =0.2 with 5.1 strata scene is a target render result with nice SSS looking and correct shadow. But I can’t get same resule with 5.2 substrate.
You can see with 5.1 strata, even the thickness goes crazy high like 0.8, and the head is already wax look but the shadow still looks “phisically” correct.
Anyway to fix that with 5.2 substrate?