About this 3D model

I printed the 3D stairs with the P1S COMBO. White PLA in A1 and black PLA in A2. It is a so-called tilted image. You see a staircase from top to bottom. Or you look from below at a staircase above you. It gets really crazy when you turn the model 180 degrees. Perception can be deceptive! Life without a 3D printer is possible, but pointless!