You can tray this

#declare My_Prism = prism{
 linear_spline conic_sweep 0, 1, 5,
 <-1,-1>, <-1,1>, <1,1>, <1,-1>, <-1,-1>
 translate -y rotate 180*x
}

object{My_Prism
 scale <32,38,32>
 pigment{pigment}
}

Alberto.

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