In article <web.3d9877d4c1649b9311db98c50@news.povray.org>,
 "Jkior" <jki### [at] zworgcom> wrote:

> What would be the best way to create water stains on a surface? I haven't
> been able to find any way to locate them in a specific location; it seems
> to me that the best way will be an image maps, but I'd rather generate
> them, since I want it to be different stains down a tunnel - many blocks,
> many stains, which will be tiresome to create as an image map.

It depends what exactly you want...just a mark from the water level 
being higher in the past than it is now? Use a gradient pattern with 
some turbulence. Marks from water dripping and running down a wall? A 
bit more difficult, an image map would give the most control, but you 
could do it with a function pattern or even an object pattern with a bit 
of turbulence. The object pattern will always give a sharp edge though, 
with no soft edges or differences in color from distance to the stain 
edge.

-- 
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: chr### [at] tagpovrayorg
http://tag.povray.org/

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