Since the 'sun' is available and controlled in position by long/lat/time (I have not tried to change the color as yet...is it possible?)
Suggest a user option (check on/off) be added to fully control the brightness and color of the sunshine.....in that way the sun becomes a "spot light" at an infinite distance (parallel light rays) that can be used for controlled lighting...such as darker days without clouds
Better would be to make that light source as a "distant light" so more than one could be used for broad lighting a scene....including interiors.
Doug.S
To be able to control the brightbness of the sun without having to change the hour of the day and hence change the light angle would be good. It would also be good it if the 'dull day' option also reduced the shadows and made them less distinct. Not sure about the 'multiple suns' - sounds a bit like parallel universes!
Allan