I saw a live performance of modern ballet put on by the Ballet Pixelle company. The backdrops and floor coverings were light watercolors; a very nice effect.
It takes a great deal of patience to rehearse and perform with a group in SL. Because of the problems inherit in SL - lag, round the world cast, lag - probably twice as much patience is needed. This troupe obviously has the patience it takes; everything flowed smoothly.