Hello,
There is an unusual artifact with subsurface scattering, please see the attachment renderComparison.png.
On the left side of the image, is a test geometry with an SSS material applied, please see the attachment matSSS.png for the settings.
On the right, is the same test geometry with a transmissive material applied, see the matRefract.png for the settings.
Neither of these two geometries are subdivided, see the attachment wireframe.png for what the topology looks like.
Looking at the left side of the render comparison, an unusual artifact on the mesh with the SSS material can be observed, the wireframe can be somewhat perceived, in a way that is not desirable.
As a comparison, I've sought to replicate the look using a transmissive material using transmission depth, it is close, and no true SSS, but there is no visible wireframe artifact.
Why would there be a wireframe artifact on the SSS material, but not the transmissive material?
Is it possible to eliminate the wireframe artifact on the SSS material?
The smoothness achieved with the transmissive material is desirable for the SSS material. Unfortunately, the noise on the transmissive material takes much longer to resolve than the SSS material and makes it unusable in production.
Using SSS would be preferred, as it resolves more quickly and with less noise.
Subdivision of the mesh does help, but it is not an answer to the SSS artifact, as you have to subdivide a lot to resolve it and even then it is still present upon closer inspection.
Is this SSS artifact known? Is there any setting or technique to resolve this artifact without subdividing the mesh?
Thank you for your time.
Tighe