I don't understand POV-Ray :)
This example works also, even there are edges:
prism {
    bezier_spline
    0, 10, 16
    <0, 1>, <.5, 1>, <1, 1.5>, <1, 0>
    <1, 0>, <1, -.5>, <.5, -1>, <0, -1>
    <0, -1>, <-.5, -3>, <-1, -.5>, <-1, 0>
    <-1, 0>, <-1, .5>, <-.5, 5>, <0, 1>
}

I don't know why it works now, but whatever.

usbhub

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