"Warp" <war### [at] tagpovrayorg> wrote in message
news:3b4cd95c@news.povray.org...
> Peter Cracknell <pc### [at] lineonenet> wrote:
>   That's probably because you are outputting a color image, not a b/w one.

:) now I feel stupid.  Though I desaturated the image, it would officially
be classed as a colour image, oops - thanks

Peter Cracknell

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