Warp <war### [at] tagpovrayorg> wrote:
> 2) The easier and faster way is to use a trick: Make the sphere completely
> transparent (with "transmit 1") like above, but instead of adding a media
> to it, add "specular 1" to its finish. (You can fine-tune the brightness
> and size of the apparent "halo" produced this way by changing that 1 to
> something else as well as specifying different values of "roughness".
> Start with "roughness 0.01".)

  Btw, this has the downside that now other lights will shine on this
transparent sphere as well. You can fix that problem by using light groups
(http://wiki.povray.org/content/Reference:Light_Group)

-- 
                                                          - Warp

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