Add vertexColorGamma attribute to StandardMaterial

[LeXXik]

Depends on playcanvas/engine#8122
Also needs a schema update on the backend.

Adds vertexColorGamma attribute to Other section of StandardMaterial.

Screenshots: left cubes FBX with vertex colors, right same but in GLB format.

FBX material Vertex Color Gamma unchecked (default):

FBX material Vertex Color Gamma checked:

Note: Vertex Color Gamma checkbox stays unchecked on the screenshot, since the backend fails to validate the path. The material does get updated, though.

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[LeXXik]

@mvaligursky perhaps we could enable the property on the imported FBX material by the frontend? Not sure where to do that. Maybe @kpal81xd has an idea.

[mvaligursky]

@mvaligursky perhaps we could enable the property on the imported FBX material by the frontend? Not sure where to do that. Maybe @kpal81xd has an idea.

Yep good call, the less breaking this change is the better.

[willeastcott]

Assigning this to @kpal81xd but not sure when he'll be free to help get this over the finish line. But thanks for getting this feature started @LeXXik! 🙏

[mvaligursky]

ah! That's the one I mentioned a few weeks ago that should be done before we ship the engine. Hmm, let's discuss tomorrow.

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On Wed, Dec 3, 2025 at 6:57 PM Will Eastcott ***@***.***> wrote: *willeastcott* left a comment (playcanvas/editor#1539) <#1539 (comment)> Assigning this to @kpal81xd <https://github.com/kpal81xd> but not sure when he'll be free to help get this over the finish line. But thanks for getting this feature started @LeXXik <https://github.com/LeXXik>! 🙏 — Reply to this email directly, view it on GitHub <#1539 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AOJIA2ZUJAXHCQYYFTKGTJL374XCVAVCNFSM6AAAAACMSD6HHWVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTMMBYGM2DCMZYGU> . You are receiving this because you were mentioned.Message ID: ***@***.***>