I think the basic thing to do is use 'density' and 'density_map' like
you would with 'color_map' in 'halo', putting the type (spherical for
example) into the density statement.  And use emission or absorption
in place of the rgbt -1 and dust type.  It's no direct exchange but
once you learn the workings a halo can be faked fairly okay.  Like Ken
said though probably better to move into media entirely and just skip
halo "conversion".  Don't forget about 'scattering' if you need to
interact with light.

Bob

Ken <tyl### [at] pacbellnet> wrote in message
news:37D### [at] pacbellnet...
>
>
> David Anderson wrote:
> >
> > Hi all!
> >
> > I am new to the raytracing world, and I would like to redo the
halo effect
> > from povray 3.0 in 3.1 . How do I do so???? The help vaguely
speaks of the
> > media object, but that's about all I know...
> >
> > Thanks In Advance
> > Me!!!
>
>   The parameters have not changed all that much though they do not
> necessarily work exactly the same. I personally believe it is easier
> to just forget what you know about the halo feature and learn the
> media feature from the start. That way you won't have any
preconceived
> notions about how it should work and become disappointed when it
doesn't
> do what you think it should.
>
> Here are a couple of links to mini tutorials on the new media
feature:
>
> http://members.xoom.com/POVRAY3/media1.html
> http://members.xoom.com/POVRAY3/media2.html
>
> --
> Ken Tyler
>
> See my 850+ Povray and 3D Rendering and Raytracing Links at:
> http://home.pacbell.net/tylereng/index.html

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