Select render mode

[blippyblips]

Would like to add/have a way to force unlit even if it's not in the metadata of the gltf/glb models.
Maybe even the possibility to swap between them. Do you have some ideas on where you would start to do this in your code base?

[ghost]

Unlit VS Lit all depends on the how the material extension is processed in the GLTFLoader, I don't believe we have any direct way to force this during loading but you could look at the loading process to gather some ideas.

I suppose if you wanted to force a material (after it's been loaded) to behave like it's unlit you would have to remove textures and set colors, the unlit extension actually provides some guidance on this:

Implementation Note: For best fallback behavior in clients that do not implement the KHR_materials_unlit extension, authoring tools may use:
metallicFactor is 0 and emissiveFactor is [0, 0, 0].
roughnessFactor is greater than 0.5.
Omit metallicRoughnessTexture, occlusionTexture, emissiveTexture, and normalTexture.

I think it's a just a matter of using the existing material API to force those settings.