In article <40675cd8$1@news.povray.org>,
 "Hughes, B." <omn### [at] charternet> wrote:

> Where I suggested to raise the densities: special attention for the
> spherical pattern since scaling it larger will also thicken the media,
> keeping in mind that media densities should be inverse to scaling. In this
> case, using the values already given for the spherical part and ten times
> for the bozo part should work good.

To clarify: scaling does not affect the media density. A ray passing 
through the center of a media-filled 1-unit sphere will pass through 2 
units of media. The same ray passing through that sphere scaled to 2 
units radius will pass through 4 units of the same media, so you will 
have to halve the density to obtain the same result.

POV can't compensate automatically because the transformation may affect 
the scale differently in different directions. For instance: say you 
scale the sphere by < 1, 0.1, 1>. From the sides, the density will 
appear the same, but from the top, it will be 1/10 as thick.

-- 
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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