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[olve11]

Hi Dimitri. Thanks for comment.
Kerkythea has some default settings
Biased techniques (Ray Tracing and Photon Mapping)
Unbiased techniques (Path Tracing, Bidirectional Path Tracing (BiPT), Metropolis Light Transport (MLT))

In preview (when i setting up scene) i use - Photon Mapping - Low 500x500
And for final rendering i usually use - Photon Mapping - High + AA 0.3
(resolution 1280x1024 or 1280x720(HD))
Something's set manually (soft shadows quality)
But sometimes have rendered image a some defects in specularity (noise).
Sometimes I used post processing software for final image

Best results we can get in Unbiased techniques, but they are much longer.

My PC set is
AMD Athlon II X2 250 3 Ghz x64 2core (longer rendering)
4 GB of RAM 1066 Mhz DDR3
AMD Radeon HD 6670 1GB GDDR5

Kerkythea used (at present) processor rendering (no GPU), so to me it is still satisfactory Photon Mapping option. But I know, that's not entirely accurate imaging.