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Media densities are clipped to the region [0,1]. (Simple proof: make a media
with a density of function{1.01} and the media will be the same as though it
were just function{.01}.) Is this the intended behavior? It seems to me that
it's perfectly logical to specify a media that's higher than 1. In fact, if
I want to keep the same average density, but create a little noise in it, I
have to do something like function{f_noise3d(x,y,z)+.5}, which doesn't work
as expected with the current behavior.
- Slime
[ http://www.slimeland.com/ ]
[ http://www.slimeland.com/images/ ]
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Media densities are specified by the color_map, not by the pattern. The
default color_map goes from black to white, you need to change it if you
want a larger range.
I don't know if the function pattern values are still clipped...you may
just be able to specify a color_map using values outside the [0, 1]
range, like:
color_map {
[0 rgb 0]
[10 rgb 10]
}
If not, you will need to scale the function value down to the [0, 1]
range and specify a brighter color in the color_map.
--
Christopher James Huff <chr### [at] mac com>
POV-Ray TAG e-mail: chr### [at] tagpovrayorg
TAG web site: http://tag.povray.org/
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In article <chr### [at] netplexaussieorg> , Christopher
James Huff <chr### [at] maccom> wrote:
> Media densities are specified by the color_map, not by the pattern. The
> default color_map goes from black to white, you need to change it if you
> want a larger range.
> I don't know if the function pattern values are still clipped...
Almost all patterns are clipped to 0-1, or at least they are only defined
within that range.
Using a function pattern that returns values outside the range of 0-1 may be
different from version to version. One should not depend on it (just like
with the other patterns).
Thorsten
____________________________________________________
Thorsten Froehlich, Duisburg, Germany
e-mail: tho### [at] trfde
Visit POV-Ray on the web: http://mac.povray.org
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