Wijnand Nijs wrote:
> Hello,
> 
> Is there a way to do this in Povray? With curling edges?
> 
> Thanks...
> Wijnand Nijs
> 
> ------------------------------------------------------------------------
> 
Hello,

Height field, mesh or isosurface? Because I always wanted to start to do 
something with isosurfaces, I started with the advice of Tom Cook.

Pov-help and the isosurface tutorial was a great help, but I have still 
some problems. How to make the image transparent for the areas of paper 
which are ripped off around the edges (advice of Slime)?

The source is:
#declare F = function {z+f_noise3d(x*5, y*5, 0)*0.3}

isosurface {
   function { abs(F(x,y,z))-0.05 }
     max_gradient 2
     pigment {
       image_map {gif "parchment.gif"}
       translate <0.5,0.5,0.5>
       scale 2
     }
}

Some parameters must be tuned, first the big problems.

Thanks in advance...
Wijnand Nijs

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