up and right define the viewing axis'. Normally, you'd set up as <0,1,0> and
right as the proportion of x to y (1.33*x). If you want to make a
"widescreen" type of image, you'd need to define a different proportion,
e.g. up=<0,1,0> and right=<2,0,0> for an image at (2:1)*M resolutions. In
your case, since you're just doubling the x, right should be <2.66,0,0>.

There is other stuff lurking in the mathematical depth of this, but for
starters, that should suffice (and that's actually all I use anyway...).

Regards,
Tim

-- 
"Tim Nikias v2.0"
Homepage: <http://www.nolights.de>

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