[Radiance-general] ambient accuracy parameter

[Marija Cvetkovic]

Hi,

I've been reading some previous posts related to ambient parameters 
settings and I have some questions.

When it is recommendable to use -aa 0 value? If I understand this 
parameter well, 0 value turns off irradiance caching, so we can use it 
when caching isn't needed (mkillum calculation for venetian blinds or 
rtcontrib).
When we set -aa 0, does -ar have influence on minimum sampling distance, 
since: min sampling distance = max scene dimension* aa/ar.

When I run a rtrace calculation with -aa 0, calculation time is much 
shorter than with -aa 0.1. Why?


Have a nice holidays :)
Marija.