Hikari_
(via google translate)
I've been making plant models for the past two days,
SSS (Subserface Scattering) on both sides of a model created with a single polygon in MaterialX did not work as intended and I was unable to resolve the issue, so I would like to ask for your opinion here. Rendering is assumed to be done on the XPU.
If you try to express SSS of a leaf with a single polygon using Karma XPU, it will look like the first image, and it probably looks like SSS processing is not being performed correctly on the back side.
The second image is the result of artificially extruding a board poly with Poly Extrude and then applying the same material, but is there a way to reproduce this look with a board poly in the XPU environment?
For this reason, I feel that it is not a realistic solution to have to extrude every time and the number of polygons doubles or more, and it becomes difficult to apply animation...
Japanese Reply:
(via google translate)SSS は多様体ジオメトリで動作するように設計されています。片面ジオメトリの場合、MtlxStandardSurface (「ジオメトリ」タブの下) で「薄肉」オプションを有効にする必要があります。これは代わりに、SSS を透過拡散 (つまり、半透明) のように扱います。これは、単一ポリゴン ジオメトリにとってより良いソリューションです。
English Reply:
SSS is designed to work on manifold geometry. For single-sided geometry, you need to enable the
"thin walled" option on the MtlxStandardSurface (under the "Geometry" tab). This instead treats the SSS like transmissive-diffuse (ie translucency) which is a better solution for single-poly geometry.