GLTFLoader does not support fully PBR

[tgranie]

Describe the bug

• Following GLTFLoader does not support Vertex Color #1506, Same code
• Load the glb file attached using the code
• Load the glb file attached in https://3dviewer.net

Expected behavior

The glb should be rendered

Screenshots

xeokit with pbr enabled

3dviewer

[xeolabs]

Note that the microfacet BRDF needs a reflection map to show the roughness aspect. The roughness channel works by perturbing the reflection from the reflection map - see this example:

https://github.com/xeokit/xeokit-sdk/blob/master/examples/navigation/TreeViewPlugin_Containment_3DXML.html#L306

[xeolabs]

However, what we are missing in glTF/GLB support so far is the bump mapping.

[tgranie]

@xeolabs Thanks for you answer : is there any plan to support this ?

[xeolabs]

We don't have it on the roadmap at present, but please contact management at Creoox if it's vital for your enterprise and we can discuss. We only handle basic materials at this stage, as required for AECO apps. Thanks