What orientation does the area light take when you use the orient keyword
under Megapov when the light is not uniform in size?  In other words, if I
have a 2x4 area light (for example) and something is off to the side, how
does it choose which rotation to use to face the object?  Does it only
rotate around a single axis, or multiple ones?

To make it clearer, say we have a column of light.  How does that illuminate
things directly underneath the column?

Geoff

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