Sheen not working in combination with hdr env?

[vector3]

Describe the bug
Sheen rendering doesn't seem to work in combination with an HDR environment map.

To Reproduce

Steps to reproduce the behavior:

1. Load an HDR environment map
2. Set the scene's environment property to that map
3. Add some generic mesh (e.g. sphere) to the scene
4. Create a MeshPhysicsMaterial and set its sheen property to some color value.
5. Assign the material to the mesh.

Expected behavior

The sheen should render even when using an HDR environment map, Instead, you have to set the envMapIntensity property of the material to a very small value or zero to be able to see the sheen at all.

Platform:

• Device: Desktop
• OS: Windows
• Browser: Chrome
• Three.js version: 131

[Mugen87]

Related #17303.

[elalish]

Agreed; this is the last remaining gap in supporting the glTF PBRNext extensions. Here are some test cases:
https://modelviewer.dev/fidelity/#khronos-ToyCar
https://modelviewer.dev/fidelity/#khronos-SheenChair
https://modelviewer.dev/fidelity/#khronos-GlamVelvetSofa
https://modelviewer.dev/fidelity/#khronos-SheenCloth

[elalish]

@WestLangley Any interest in trying your hand at this? I'm kicking myself I haven't found time for this yet, but I may have to this release cycle if no one else does...

[SixBytesUnder]

HI @elalish
Did you have a chance to look into this one?
I'd love to know if you have any idea of a timeline to fix this.