In article <3c420bd3$1@news.povray.org>, "25ct" <25c### [at] lineonenet> 
wrote:

>       Thanks Warp, I'm just practising with this at the moment. I want to
> put a hole in a door and add one of those 'spy-holes'. The lens may be
> difficult though.

This sounds like difference would be a better choice anyway...what was 
your reason for using clipped_by?

-- 
 -- 
Christopher James Huff <chr### [at] maccom>

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