I need a cylindrical heightfield from my bitmap.
The following code doesn't work:

#include "shapes.inc"

#declare F = function {
    pigment {
       image_map {
       	png "foo.png"
         map_type 0
       }
    }
}

object {
    HF_Cylinder (F, off, off,
<60,60>, on, "", <0.5, 0.0, 0.5>, <0.5, 1.0, 0.5>, 0.4, 0.3)
    texture {
       pigment {color rgb 1}
    }
}

How can I make it work? Is there any other macro(s)
making cylindrical heightfield or cylindrical mesh
from bitmap?

Gena.

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