In article <40376b93@news.povray.org>,
 "Nickj" <nad### [at] yahoocouk> wrote:

> There's not really much photorealism in astro photos as apart from the
> optical ones they all use false colours anyway. Perhaps these use a
> different colour table to most but that's allright!

Technically, most are as "photorealistic" as any other color photo, we 
just lack the technology to properly display them and the proper senses 
to perceive them. Most astronometric photos simply use each frequency as 
a different color channel...for example, infrared as red, the green 
shade the eye responds most strongly to as green, and ultraviolet as 
blue. Or green, ultraviolet, xray, or microwave, infrared, ultraviolet. 
Or they will use the strength of a set of emission lines...hydrogen, 
oxygen, carbon, etc. Images where they map a single intensity to a color 
map usually aren't as visually interesting or attractive.

-- 
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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