What data is saved in the first pass? Is it specific to that camera 
position, direction, up, right etc? Or does it calculate radiosity 
throughout the entire scene, even off camera?

Is the data specific to the image size, or can I do the first pass at 
800x400 and the second at 1600x800 (even if accuracy is lost) or will 
that apply the save radiosity to the (eg) upper left corner of the 
resulting render?

Cheers!
Rick Measham

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