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Yadgar wrote:
>
> Hi Tracers!
>
> My first serious attempt at an Afghan landscape (to those of you
> familiar with the country, it's the lower Arghastan plain about 30 miles
> south-east of Kandahar...)... after weeks of arduous manual pixeling
> work on a scanned b/w 1:300.000 topographic map of the area, I finally
> got together a preliminary 16bit heightfield of 198 by 500 pixels, each
> pixel representing a square with sides of 25.4 meters. Of course, I also
> wanted a realistic surface texture - and that's where many problems
> begin.
>
The most common method is to use satellite or aerial photography and
classify them according to a set of surface types.
Some info on this can be found for example in:
http://www.cs.utah.edu/vissim/papers/snowTerrain/
You can also try to conclude the information from the terrain geometry
like done in:
http://www.graphics.lcs.mit.edu/~boh/Projects/snowGenFinalWrite.html
for snow, but without further information this will be very inaccurate.
Christoph
--
Christoph Hormann <chr### [at] gmx de>
IsoWood include, radiosity tutorial, TransSkin and other
things on: http://www.schunter.etc.tu-bs.de/~chris/
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