GLTF with 3 UV Maps throws an error

[ethereumdegen]

Bevy version

Release 0.13.2

What you did

Try to load a GLTF with 3 uv maps like this (inside of gltf file) :

"meshes":[
		{
			"name":"Mesh.001",
			"primitives":[
				{
					"attributes":{
						"POSITION":0,
						"NORMAL":1,
						"TEXCOORD_0":2,
						"TEXCOORD_1":3,
						"TEXCOORD_2":4
					},
					"indices":5,
					"material":0
				},
				{
					"attributes":{
						"POSITION":6,
						"NORMAL":7,
						"TEXCOORD_0":8,
						"TEXCOORD_1":9,
						"TEXCOORD_2":10
					},
					"indices":11,
					"material":1
				}
			]
		}
	],

What went wrong

Bevy throws an error

WARN bevy_gltf::loader: Unknown vertex attribute TEXCOORD_2

Additional information

If this is supposed to error, explain it in the docs and also when the error is thrown, print out the path or name of the GLTF that is failing to load . If this is not supposed to error and that functionality should be supported, support it in the vertex attributes loader for gltf.

[NthTensor]

Looks like we are not fully compliant with the gltf spec. See the definition of TEXCOORD_n in the meshes chapter.

Not sure if we want to/plan to add support for multiple UVs. If we don't we should fix this error to be more explanatory.