I am working on this bathroom sink, but really need some advice on how to get the lighting and compositing right. I also have no idea how to get the grainyness to go away completely. Any tips would be great!
OKay. Design looks simple but good. First of all i woul add some textures to the wall and to the ground so it looks more like a bathroom-scene, then instead of a window i would add a mirror on the wall which reflects some background (or instead of that make the window bigger ( in height as in width). Also it should have some kind of a frame maybe…
For the lighting i highly recommend this http://www.blenderguru.com/videos/mastering-lighting/ and getting some info about lighting in general (google helps a lot)
Topper93
That is a mirror 
I haven’t had any more time to work on it but ill look for some good bathroom textures when I get a chance. Should I add a light fixture or counter space or towel rack or something to make it more believable?