Hi, I'm trying to understand how I can get 3- or 4-channel per-vertex data into the Graph Editor.
From my tests, it seems that:
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the "Geometric Property" node does not give access to 4-channel data,
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"Geometric Property (vector3)" does not give me access to custom properties besides the ones defined in MaterialX core
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the "Texture Coordinates" node has a vector4f mode (yay!), but according to MaterialX spec, texcoords must have 2 or 3 channels, and I can't get 4-channel data to show up there either.
My assumption so far is that I must be missing some "magic" – for example, do the primvars in a file have to be in a specific order, independent of their names? Or do their names matter? (E.g. convention would be primars:st and primvars:st1 and so on)
Unfortunately the forum doesn't allow me to attach any USDZ or ZIP files or GDrive links; if there's a way to share a test file I'm happy to do so!