Peter Popov wrote:
> 
> #declare F_Relief = function {
>   pigment {
>     image_map { tga "relief.tga" interpolate 2 }
>     rotate 90*x
>   }
> }
> 
> #declare F_Terrain = function { y - F_Relief(x,y,z).gray }
> 
> Any idea why the max gradient would be that high? I ended up making a
> mesh out of the tga in Rhino instead, but I want to learn to do this
> right.

Try 'interpolate 4'.  IIRC interpolate 2 does not lead to a continuous
function, therefore the high gradient.

Christoph

-- 
POV-Ray tutorials, IsoWood include,                 
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Last updated 03 Aug. 2002 _____./\/^>_*_<^\/\.______

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