By Michael Webb
For visual spectacle it would be hard to top the sets for Dulce Rosa, a new opera that is receiving its first performances at the Broad Stage in Santa Monica through June 9. In fact, there is only one physical set: A broken arch, some flats and a flight of steps, but these serve as projection screens. As the action moves from back streets to a hacienda, a guerrilla outpost in the jungle, and a family chapel, the scenes shift seamlessly as though we were watching a movie. Most opera productions make do with a single versatile set or resort to heavy lifting during long intermissions. That’s another kind of spectacle—prominently featured in the Met Live productions—as troupes of stage hands roll one vast construction into the wings to replace it with another.