Hi,
Well, I did not actually want to download MegaPOV, but perhaps I'll give it a
try....
Ever tried to modell smoke with macros and triangles ? :-)

Thanks for your help,

Hendrik Iben

Mike Williams wrote:

> Wasn't it Hendrik Iben who wrote:
> >Hi,
> >It might be better to give an example of what I want to do :
> >I want to visualize interference in 3d space by altering the
> >color/refraction of an object in space. Another nice pattern would be the
> >simulation of smoke and things like that. So I do not need the position of
> >the object(center) but just the position the raytracer is at. I do not know
> >if this will look  good but I would like to see it...
> >There must be some sort of interface for things like this in pov-ray since
> >the bozo pattern does a simlar thing. I can't believe that theses patterns
> >are just built in...
>
> In official POV-Ray, the pigment patterns really are built in. However,
> in the unofficial MegaPOV it's possible to use isosurface functions to
> generate a pigment pattern. You can control the colour and transparency
> of the surface, but not the refractive index of the interior.
>
> There's a bit of a description of this sort of thing in my isosurface
> tutorial: http://www.econym.demon.co.uk/isotut/pigfun.htm
>
> I don't really expect that you'll have much success with getting any
> remotely realistic smoke without using media, but perhaps you might try
> having an isosurface pigment on several closely spaced planes, and
> setting them to be so transparent that each individual plane is
> virtually invisible.
>
> Hint: If you try this, don't forget to set
>    global_settings { max_trace_level
> to a number that's greater than the number of surfaces that you want the
> rays to penetrate.
>
> I'd be interested to hear if you have any luck.
>
> --
> Mike Williams
> Gentleman of Leisure

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