Russell Towle wrote:
> 
> DEM data is better handled by POV's "height field" function, which creates a
> mesh of triangles on the fly.

In this general form this is certainly wrong.  Using an isosurface is 
more memory efficient and you can get much higher quality results (no 
mesh artefacts).  In most cases an isosurface will render slower than a 
heightfield but often this is not the most important factor.

Christoph

-- 
POV-Ray tutorials, include files, Landscape of the week:
http://www.imagico.de/ (Last updated 15 Oct. 2006)
MegaPOV with mechanics simulation: http://megapov.inetart.net/

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