While on the subject of Odd Cameras, here's my latest proposal that I don't
have time to code...free to a good home:

    "inverse" in the camera definition to mean that rays are traced inwards
from infinity. So you could see five sides of a cube... or *all* of
something with an inverse fisheye. Like looking at a neutron star, or one of
those map projections that shows all the earth on a circle.

    Useless? Probably, like super-ultra fisheye lenses.  But fun.

    -Robert Dawson

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