Anthony D. Baye nous apporta ses lumieres en ce 2005-05-07 07:50:
> The first installment in a new project I'm working on.  This is actually a
> scale model I did for concept purposes, the scale is way too small for the
> purposes of my concept tho. (1 unit = 100000 miles)
> 
> I'll be trying to scale it up a little at a time.
> 
> One problem though, is that I used a sphere with a pair of scattering medias
> to create the general luminosity pattern, then overlaid a universal media
> to give it color.  The effect, while quite striking, renders the starfield
> in the background completely invisible. (And yes, I do realize that at that
> proximity to the sun, you probably wouldn't be able to see the stars
> anyway, but It may interfere with other media effects in the scene later.)
> 
> I'll post the source in P.B.S.F. if anybody want's to play around with it.
> I'd appreciate any suggestions or comments.
> 
> A.D.B.
> 
> ------
> If this little world tonight / suddenly should fall through space
> in a hissing, headlong flight / shrivelling from off its face
> as it falls into the sun, / in an instant every trace
> of the little crawling things / ants, philosophers, and lice,
> cattle, roaches, and kings, / beggars, millionares, and mice,
> men and maggots all as one / as it falls into the sun...
> Who can say but at the same instant / from some planet far
> a child may watch us and exclaim / "See the pretty shooting star!"
> 
> 
> 
> 
> 
> 
> ------------------------------------------------------------------------
> 
Contain the "universal media" in another sphere and give it a spherical density
apropriately scaled. 
This will also make the render aster and may enable some stars to show. You may also
enlarge your 
actual sphere a bit, the media ends abruptly while it should fade to nothingness.
For the stars, you may want to increase ther brightness. Try increasing the values
used in the 
pigment used (just add a value to multiply the colour vector like rgb<1,0.7,1>*3)

Alain

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