I know that you can force the camera into any orientation using 
the sky and look_at keywords, or the direction keyword.
The question is, who do you leave the the sphere alone
and re-orient the camera so that it looks like you are standing
on the surface.

Bob Hughes wrote:
> 
> Re-reading your idea there I still wasn't positive of what you are
> trying. However as far as moving the camera around to any point on a
> surface of a sphere you are going to run into something awkward about
> the camera orientations. When it reaches a point perpindicular enough to
> a plane it will switch scene directions abruptly. I don't know enough to
> help, just wanted to bring that up.
> 
 
Advanced means constantly wondering where reality gets its processing
power.

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