this is the correct address....
www.crosswinds.net/~povstudy
Regards,
C.J.


"C.J." <hou### [at] yahoocom> wrote in message
news:3a4111d4$1@news.povray.org...
> Phil,
> I have 3 media tutorials in the PRSG that may help you. Look in POV
Advanced
> under the tutorials section.
>
> www.croswinds.net/~povstudy
>
> Hope it helps,
> C.J. - POV User
>
>
> "philhall" <phi### [at] iocom> wrote in message
> news:3A41116E.42279D13@io.com...
> > Chris Huff wrote:
> > > media {
> > >     emission color White
> > >     samples 100, 100
> > >     //you will probably want to change the samples setting to
> > >     //something more like: samples 75, 125
> > >     //of course, the numbers depend on your scene...if you use
> > >     //MegaPOV and method 2 or 3, you can get away with much smaller
> > >     //numbers.
> > >     density {spherical turbulence 1.5
> > >             //use the "spherical" pattern to control the density
> > >         color_map {
> > >             //I don't know what you meant with the "t" channel,
> > >             //you will need to adjust the brightness of these colors
> > >             //to get the right results.
> > >             [0.0 color rgb < 1, 0, 0>]
> > >             [0.6 color rgb < 1, 1, 0>]
> > >             [1.0 color rgb < 1, 1, 0>]
> > >         }
> > >     }
> > >     rotate < 0, 90, 0>
> > >     scale < 0.6, 0.5, 0.6>
> > > }
> > >
> > > You can generally ignore ratio, variance, and confidence, the defaults
> > > are usually sufficient. Don't bother messing with transmit or filter,
> > > the brightness of the color defines the density, black is completely
> > > transparent. Try experimenting with emission media at first, it is the
> > > fastest rendering.
> >
> > Thanks for your help. I'm getting slightly better results with your
> > advice but it still looks like a big splotch of color. I'm basically
> > trying to make a nebula type effect inside of a glass sphere. If density
> > is controlled by the brightness of the color, how can I get a nebulous
> > effect with vivid colors? Also, I don't seem to be able to get any
> > turbulence. Its more sort of rings of color that fade into each other.
> > Do you have any more advice or could you point me to some place that has
> > good examples and descriptions of getting this media thing to look good?
> >
> > -Phil
>
>

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