poisson with the smooth fill COP or the attribute fill SOP leave the contour lines pretty visible because they only try to stay C0 smooth… i fear we must reach for everybody’s favourite
the help has an RBF interpolation that i just adapted and keeps things much smoother… good example of how brittle the linear solver can be as well though, changing the RBF function or the numerical range of the inputs can instantly stop it converging or make it output nonsense
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