While watching "T-Shirt War," a stop-motion short by comedic duo Rhet and Link, you may be fooled into thinking that the pair got lazy and animated the shirts in post. Not so, it turns out. Rhet and Link used a whopping 222 specifically designed shirts, which, with some clever photography, brings all the action to life.
From Rhet and Link:
We changed shirts over 100 times each, taking individual pictures of each unique shirt. The designs on the shirts are not photoshopped. They are real shirts for each frame of animation. The video was exported at 30fps, while the T-shirt animation moves at 6fps (with a few exceptions where it moves faster) So, for each shirt, we took 5 pictures, so the animation of us moves at 30fps, but the T-shirt animations move a bit slower.