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Description
This is impressive!
You said that you were open to feature requests, so I hope this will be OK to suggest:
It would be great to have a tetrahedron primitive. Even better would be per Vertex colors…
And, blue sky dreaming, a 10-nosed tet with side nodes (vertices) giving quadratic sides to the tetrahedron edges, with many such tetrahedrons (for example finite element visualization).