[Radiance-general] rif settings: quality variability detail

[Christopher Rush]

There an overview table on pages 517 and 558 of Rendering with Radiance
for direct and ambient settings. I'm not sure if some of the other
settings are outlined in a similar manner in other portions of the book.

I suspect that the actual values given in those tables may be simplified
or have been updated since then. For example I thought that setting
Quality=High and Variability=High will give an -ad parameter above 1024.

> Quick question:  Can anyone tell me how the rad program interprets the
> HIGH/MEDIUM/LOW settings in the .rif file?  Does each setting have a
> corresponding pre-determined list of rpict parameters, or does it take
> scene geometry etc. and determine appropriate parameters each time?
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