I've got a complex scene that is extremely view dependent. In my
scene-building sessions, I'm fidgeting around with subtle positioning of
some of the geometry. To keep my "render/adjust/repeat" cycles down, I'd
like to render, say, the lower right quadrant of the image, at a higher
resolution, but WITHOUT moving the camera. Is there a way to do this from
the command line? I'm imagining something like this:

povray +i scene.pov +W1024 +H768 viewleft=50% viewtop=50%

It would render my scene with regular camera setup, but would only actually
fire rays through the lower right corner of the defined camera viewport.
Ideally it would fire rays at double the resolution and fill the entire
1024x768 with a higher-res view of the lower left portion of the image. But
I could live with it if it only rendered that portion of the image, leaving
the rest blank. I could get what I want by just rendering at W2048 H1536.

Jefficus

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