Nicolas Calimet wrote:
> 
>     I still don't quite understand how this would work from the user
> standpoint (I'll look later at how imagemagick does) i.e. how the user
> tell povray to use whatever image or pattern.
>     Well probably too much coding of color bitmasks these last days...

Well - with Imagemagick you can specify 'magick:LOGO' (or 'LOGO:' in old 
style syntax) as file name to obtain the internally generated logo 
image.  Same for other images or patterns like 'pattern:checkboard'.

So when POV-Ray has a command line option -background <file> just use 
something like -background internal:TRANSPARENT

I know there currently is no such option but it could be introduced 
(alternatively/additionally an environment variable).

Christoph

-- 
POV-Ray tutorials, include files, Landscape of the week:
http://www.tu-bs.de/~y0013390/ (Last updated 24 Jul. 2005)
MegaPOV with mechanics simulation: http://megapov.inetart.net/

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