@freemo Truth is, usually this drawings are done a flat surface (2d) and they are called 3d, as they look realistic. This one is developed in height too, as there is the painted wall, so it added a dimension, making it a 4d. This should be it :) @Lou
Just a possible explanation
@arteteco What do you mean, takes time to draw it, or does it actually play an animation or something? Or do you just mean it exists in time? @Lou