Am 22.11.2012 09:16, schrieb Jaime Vives Piqueres:

>> I have a kitchen HDR [...]
>
>    Is that the one from Paul Debevec? If so, I've a setup of two lights
> which fits close enough the default spherical mapping of this HDR into a
> sphere, so the lighting and highlights seem to come effectively from the
> HDR. It's what I used for the fruits bowl scene... it took me a while,
> with lots of trial& error until I found the positions. Just ask for it...
>
> --
> Jaime
>

There are tools around that do extract the approximate position of one, 
two, three or even 20 or 100  light sources from any given HDR by using 
a median cut algorithm. Have a look e.g. here:

http://gl.ict.usc.edu/Research/MedianCut/

and I think even PoseRay can do it.

-Ive

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