PORTLAND, Oregon — A cavernous room in an abandoned factory that once made window coverings is showcasing a different kind of window. Artist Jennifer West has installed a set of transparent plexiglass frames covered with strips of 35mm and 70mm film. Viewers are invited to enter this dark space and shine flashlights onto the film strips, casting colored shadows that envelop the room. As visitors tinker with their flashlights, the bright emissions change, intersect, and turn the vast walls into ever-evolving spectacles of dancing light.