This is a perfect example of how it helps to read a file thoroughly. I 
wasn't paying any attention to most of it as I went in and began changing 
things just so I could get a POV-rendered look at that lunar penumbral 
eclipse before tonight. I didn't even try the commented out line for look_at 
<XMOON,YMOON,ZMOON> until a little while ago! Of course, I wanted the Earth 
in the view anyway, so... I've probably made a real mess of your original 
file, which I'm keeping separate.  ;)

I think maybe I know now what you were saying about the light and shadow, 
how the camera viewpoint is found along the moon and sun line then placed 
near the earth on the sunlit side. At least I guess I do, this kind of thing 
makes my head spin. The part immediately after the Earth and Moon object 
creation is the calculations for that. Not sure if the comments have an 
error where it says: x^2 + y2 + z^2 = EARTHRAD^2^ since I'd have thought it 
would say x^2 + y^2 + z^2 = EARTHRAD^2 but I'm not the one to second guess 
you on that. Ha ha!

Fun to mess around with it, regardless of my ineptitude.

Bob

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