Matt Estela

Vellum and RBD can't directly affect each other.

Vellum does have a shape match constraint, which lets you make pretty rigid objects, and they then play nice with the rest of vellum.

Had a play today between other tasks, its ugly, and well past the point of 'is it worth it?', as I reckon you could fake it with just expressions and some clever sop tricks, but anyway, its a start.

Curious if anyone else has better ideas here. The alternative is go the other way, build this all in rbd, do the belt as a chain of connected rbd objects, but I'll leave that for someone else to solve.

lower level material assignments override higher level ones.

Yep, xpu is targeting materialx as its supported shader format. The mantra principled shader is getting live translated as a convenience, other mantra/vex nodes won't work.

Here's a hip of a stripey material built in materialx, it will work in both Karma CPU and XPU.