"Burki" <nomail@nomail> wrote:
> spotlights pointing in +/- all directions. The scene I made produced some
> strange artefacts
> What can I do to get rid of these?

Hi Burki!
You're trying to cast spotlights towards infinity... and, quoting
3.3.2.1  Atmospheric Media :
"Note: POV-Ray cannot sample media along an infinitely long ray. The ray
must be finite in order to be possible to sample. This means that sampling
media is only possible for rays that hit an object. "
The black circles are not in the z-negative direction but rather in the
z-positive. They show up when Pov stops sampling after some length of the
cone of light. Add a plane {z, 2000 inverse pigment {rgb .5}} to your
scene, you'll discover that pov stops sampling around +2000 in the z
direction. Hence a possible workaround: arrange your scene so that theres
something for the spotlight to hit before +2000*z, or tweak the camera so
that these artifacts are out of view.

Hoping this helps!

JYR
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Windows XP HomeEdition//AMD Athlon XP 2800+1 MB RAM

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