> > I think he's trying make a HF out of a satelite picture, so I'm not sure
> > those macros would help. Still, should be easy to write a similar macro that
> > uses as image.

originally, it's DEM->TGA->edited image.  So yes, USGS data initially, 
then edit it, then make a very high res terrain from that. 

> > The macros take functions as input, so there is no problem with using an 
> image.

I'll look into that.  I tried a mesh earlier, using Wilbur as a TGA->
Mesh converter, but it's normal calculations were broken, so it looked 
quite faceted.   Even with the broken normals issue aside, I wasn't able 
to get that many points into the surface before running out of memory / 
hitting internal POV limits (I've got 1.5GB RAM--maxxed for this 
machine) I think POV maxxed out parsing a 500x500 point mesh inc file.  
But by using a macro, I might get farther without having to have a 
several GB .inc file to parse.  

It was also much much slower, parsing such a huge .inc file, but I can 
live with that if it ends up working.

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