Hi there, for the first image is great but 2 other must improve. you better in night lighting then daylight. actually for the daylight the background view outside of the window, must be overbright. but on your scenes, its nothing happened there. for the background pic also not suitable to the angle of the cam, check for the horizon!!! does it suitable to the cam? no think...its better the background of the night scene. the horizon is suitable to the angle of cam.
for sun light the 2nd one is better then the 3rd one. it looks natural.
anyway, on the 3rd scene, where's the candelier and the downlights gone?
sorry for my corrections...but anyway wishing u can be improve better and better...cya...