Im already doing this (see github link above).
The problem is if you make modifications to the buffer you will then need to add code or shader modifications to support the changes in the buffer elements.
The model material is even more strict, due to the anim. I have done a fair amount with the mesh component (in a geom generator too) and Im not sure you can get extra information into the buffer with out custom code or shaders.
I think what you are suggesting is something like this:
{
"name": "texcoord0",
"type": "float32",
"count":4, -- <<--- 4 instead of 2, adding extra uv's to the same buffer
"data": [
MESH_UV_DATA
]
}
Which would work, but again you need to be able to support that in the materials etc. Im pretty sure I tried this in the past, and the resource loader fails to load it. I’ll check again (was a early last year when I tested that).
What I was suggesting is another complete texCoord stream - which would require a engine change, but I think this might be potentially more useful, especially if it was designated a “custom” stream and thus allow buffers with all sorts of different data in them.