Found an issue with transmission on a light causing artifacts on a material with subsurface scattering.
Steps to reproduce:
- Turn on “transmission” on a light (light set to moveable).
- Make a material with SSS.
The material here is quite simple. It has a color going through a Transmittance-to-MPF where the color going in has a value below 1.
When it the value is set to 1 you get fireflies in a bottle:
I’m seeing this on both Slabs with MFP (The head on screen right in the image below) as well as on a Slab with SSS Profile (the head on screen left).
I do not see this on a Surface Profile material in UE5.0. The above was tested in UE5.1.
Is this a known issue, and are there any workarounds to get back-scattering with Strata? Forward-scattering works wonderfully!