LeWitt’s film, projected on a scrim in front of the stage, shows the original cast — including Ms. Childs — moving in sync with the current dancers.

I began to understand that the voice could be an atmosphere, or a scrim, or a curtain behind him that suggested otherworldly places.

Projected onto an otherwise invisible scrim, the raindrops appear to fall from the ceiling and splash into the open top of a sleek black box.