On 04/15/2011 01:15 AM, Tim Cook wrote:
> Question about use of HDRI and reflection mapping...how does one get the
> positioning come out correctly so that shadows fall on the 'ground' of
> the surrounding image, and the object itself appears to sit on the same?

First I start with the image on a smaller sphere at origin. Map out 
where the bright spots and points of interest are ... Use an even 
smaller set of spheres (think of them as pins on a map) and transform 
them around the image sphere. Works best with camera at -z ... that way 
x is up and down and y is left and right.

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