Still inspired by the great advice of Jeffrey McGrew in this thread, and determined to find the holy grail (or just the best settings for doing interior renderings with artificial lights only), I did a little Googling, and found that the rendering gurus have a history of using a "Cornell Box" to tweak their settings in various software packages. - So figured that it would be cool to have such a box in native Revit format, to test the various rendering settings.
The box is scaled up by a factor 10, to make it closer to actual room sizes - But besides that, it should be pretty close to the original Cornell Box.
I´m posting the project file, hoping that some of you might find it fun to tweak the settings and compare results here in this thread.
To ensure the best possible comparison results, please just open the camera view named "4_Custom", and ONLY make changes to the Render Quality Settings (Don´t mess with resolution, lighting, etc.)
Also, since our hardware is not the same, you´ll need to run renderings of the 3 other camera views too, and post the rendering times.
In the following, I´ll be testing each setting one by one, to get a better understanding of the affect they have on render time and quality.
See the Autodesk Wiki for more information on the Render Quality Settings.
Hope you´ll find time to play with it too