A few comments on camera behavior:

I haven't used angle much with the orthographic camera, mainly because it
doesn't make sense to me. (iow, what can "angle" mean when all the rays in
question are parallel?) I did notice, however, that POV will change amount
of scene that is in view when the "angle" is changed. Perhaps there should
be a different keyword (such as "zoom") to work with the orthographic
camera.

As for multiple camera blocks, there are other ways to handle them besides
disallowing them. When I first tried to use two camera blocks, I expected
to render two images, one with the first camera, and then start a second
render with the other camera. Perhaps, alternatively, a second camera
block could simply replace the first camera, wiping out the previous
camera settings.

John Haiducek

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