A tad cleaner, and regarding the setup there is nothing special going on:
Physical sun/sky with portals outside the windows, photographic exposure with altered whitepoint to get some yellow tint into the room. FG only, 2 diffuse bounces if I recall correctly, high point density (2) to get rid of an annoying lightleak by the windows.
AA: -1/2 Mitchell (0,025).
Cheers
//NIC






