Warp wrote:
> 
>   May not work. If the rays don't originate form a single point, then the
> other method may not work either.
>   Also area ligths may cause problems.
> 

The other method (placing the object around camera/light) should still work, in
most cases.
AFAIK the only projections where the camera origin moves are orthographic and
cylindrical 3 & 4. Orthographic will be a problem since the bounding box around
the camera will have to relatively (as large as the up & right vectors). For
cylindrical projection you can use a very thin cylinder around the camera axis,
so there is little likelyhood of reflected rays hitting it.
Area_lights can have the same problem as orthographic camera, but they generally
fill a smaller area of the sky, so problems are less likely.

-- 
Margus Ramst

Personal e-mail: mar### [at] peakeduee
TAG (Team Assistance Group) e-mail: mar### [at] tagpovrayorg

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