Falling Leaves Make the falling thing read as a leaf. Reach for when you want a bounded atmosphere of generic motes. Reach for this when the shape has to be recognisable. Build the tumble first Turn each leaf about its own long axis so it shows its face, thins to nothing edge-on, then opens out on the other side. That instant of near-disappearance is what the eye reads as "leaf". A sprite that only spins in the picture plane reads as confetti, a coin, or a paper scrap, however good the artwork is. On 2-D canvas the tumble is a horizontal scale that crosses zero: Drive two axes, not one. turns…