A piece of wall can be visually disintegrated from the whole into a separate triangle by plunging a diagonal of light from edge to edge on the wall; that is, side to floor, for instance.
“The countdown reached ten seconds and I could almost hear an invisible crescendo of stirring background music. 'Anchors aweigh!' Five, four, three, two, one... and we had ignition!”
“I did a show called 'Wonderland' a few years back, and I was fortunate enough to spend a full-on two weeks - I'm talking 13-15 hours a day - with the doctors and patients at Bellevue in New York. That served me well for 'Durham County.'”