Ralf, thanks. You're right, that fixed it. It still seems counterintuitive.
In my example, the shadow behind the holes on the left look as expected, but
on the right it looks like the light source is to the right of the camera. I
suspect I need to visualize differently.

Ken

Ralf Muschall wrote in message <373B5DCF.6003874A@t-online.de>...
>The picture looks right (i.e. it looks how I'd expect it):
>your lamp is almost infinitely away, causing the shadows to
>be parallel images of the holes. OTOH, your camera is rather
>close, thus the shadows (which are more far away from you than
>the holes) seem smaller than the holes -- just as in the GIF.
>
>If you want all shadows to look equal, put the lamp and the
>camera into the same vertical plane parallel to the walls
>(i.e. equal z for your orientation).
>
>Ralf

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