That last atrium scene was very good. It's interesting to note how Carrara render times differ from Shade (Curious Labs) in regard to photon count. E.g. a Carrara render with 20,000 might take the same time as a Shade render with 1,500,000. I get the feeling that the two algorithms must define photons differently, and that Shade is undercalculating the effects as compared to Carrara.