In article <3dd56a62@news.povray.org>,
 "Andrew Coppin" <orp### [at] btinternetcom> wrote:

> As I understand it, anything with a non-zero ambient setting will in effect
> "glow". My experiments seem to back this up.

This is true.


> Only trouble is, they don't glow very much; I'm having to use things 
> like "ambient 10" to get enough light in my scene! (That's fine if 
> the thing is white - doesn't work too well for pastel shades though.)

That isn't a problem. If you think about it, the intensity of light at 
the surface of a fluorescent tube is much higher than the intensity of 
light reflecting from a sheet of white paper. These very bright values 
are necessary and correct.
I don't know what you mean about it not working for pastel shades, 
though.


> Also, the images are very patchy. Now, when I just dunked an empty
> radiosity{} block into my scene, I wasn't suprised that the defaults didn't
> magically work perfectly. But... I've been fiddling with the settings for
> ages, and it's still blotchey. I've managed to improve it quite a bit, but
> it's still there. POV-Ray is obviously trying its hardest to smudge out
> those pixel artifacts from the pretrace step... but now quite suceeding.

Well, it sounds like you are trying to light the scene entirely with 
radiosity. This is possible, but it usually takes a bit of experience to 
get right...you are starting out with one of the more difficult ways to 
use radiosity.
There was a craze of radiosity lit images on these newsgroups a while, 
try searching the *.binaries.images group for radiosity images.

-- 
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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