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More than one hole, I mean…
I’m trying to export from Mathematica into the X3D format, with the longer term goal of generating 3D figures for PDF inclusion. But I'm stuck at the first step:
p = ParametricPlot3D[{(2 + Cos[v]) Sin[u], (2 + Cos[v]) Cos[u],
Sin[v]}, {u, 0, 2 Pi}, {v, 0, 2 Pi},...