StandardMaterial Sheen does not work with Specular workflow

Open Maksims opened this issue 11 months ago • 2 comments

If a material uses specular workflow (useMetalness is false), then sheen will be ignored.

Feb 07 '25 14:02 Maksims

Possibly this is the problem?

https://github.com/KhronosGroup/glTF/blob/main/extensions/2.0/Khronos/KHR_materials_sheen/README.md

KHR_materials_sheen

Exclusions
This extension must not be used on a material that also uses KHR_materials_pbrSpecularGlossiness.
This extension must not be used on a material that also uses KHR_materials_unlit.

Feb 07 '25 14:02 mvaligursky

Should the engine do same limitation? It kinda works, if you specify sheen, end then tick back and forth the useMetalness, then it applies it in Editor.

Would be great to have it regardless of specular/metalness workflow.

Feb 07 '25 15:02 Maksims