innubus: Looking pretty good. The stoves and objects are very dark while the walls are bright and evenly lit. The focus of the light would look better if it were on the stoves and other objects. You may also have to increase your trace depths. The bottles and pots are almost black.
yassein: Nice start! Your lighting could use some more falloff, it’s hard to judge where the source is. The foreground and background are really blending together. Try darkening the background some to create some more depth. A change in light color in the background would also create some separation.
at2142: Coming along nicely. The window could be creating some brighter reflections/highlights on a lot of the objects, especially for how bright the window is. The shelf all the way at the top of the image is getting too dark. I’d expect it to get a lot more light bouncing off the wall. The bottom right of the image could use some more fill light, the dark areas make it look very dirty. As for your UP reference image you have. Soft lighting like this needs lots of falloff/penumbra on lights and soft shadows. Also, the bounce light is very important.
ScallyFox: Welcome! I wish I could help you with this but I don’t know much about Renderman, though I wish I did. Maybe you have to increase your samples.
Cylex: The scene was made in maya 2011. Since you’re using maya 2010, you’ll have to enable ignore version in the open scene options.