An American in Paris: The Musical

It won't remain unnoticed, despite being the silent accompaniment, as it constantly changes and revolves, with a projector somehow making it seem as if the scene (water, often) is real.

It is something that ends up having an impressive result, sets up quite an atmosphere, along with the lighting... even the abstract sets at the end are simply interesting, although later on they end up making artistic sense.

Even the efficiency with which the stage was modified was compelling to notice... people mostly wheeled them out, but they did it not in a very intrusive manner; lighting (or lack of it) was also in this case used to create shadows or hide some background machinations, and in the end it is as if it is an entirely different theatre.