This is an experiment using a bunch of Daylight Sources arranged in a semi-sphericall array arround the camera, and pointing to the scene, more or less following the lens FOV angles. The idea was to tell ARnXt to give priority to the light pointing to the scene.
The very interesting thing here, is that the shadows of the hanging light fixture on the ceiling, as well as the shadows of the couch against the right wall, are suggesting that the light is mainly coming from the left corner of the image, although the Flash Daylight Sources are located in the camera. This means that Daylight sources do not care from where the light is coming, but where we want the light to go. This statement reinforces the theory of the Flash Daylightsources, and perhaps it could be added as an automatic option when the light needs so many bounces to reach to the main planes as in this extreme case.
The pending experiment would be: to create an inverted daylight sources box, so that all daylight sources will point to the center of the cube. This cube should have a size similar (a bit smaller) to the room size. In this way I assume we would be telling ARnXt to give priority to the light coming fom anywhere but pointing the 6 planes that defines the main space in this scene. At first sight this have more sense than the current experiment. My assumption is that the result will be very similar. If so the theory of the flash daylight sources will be more supported.
Ernesto