Hello!
I did this image in Blender 2.73 and rendered with Luxrender 1.4.
I did it as a study of different render engines: internal, cycles and Luxrender. You can see the other results here:
http://blenderartists.org/forum/showthread.php?365822-Violoncello-Scene-a-render-engine-study
Feedbacks are welcome!
Nicolas.
PS: My father was a great violoncellist, so I decided to do a scene during a rehearsal break in a theater.