Azulejos, A Seemingly Impossible Tile Illusion
In the baffling illusion, “Azulejos,” Buenos Aires magician Norberto Jansenson removes sections from a rectangle of tiles without apparently diminishing the size of the rectangle. YouTube commenters point to two edits in the video as the key to the illusion, but Jansenson insists there is no video trickery involved. The illusion appears to be a variation of the missing square puzzle, which is explained in this video by James Grime: