Three-Dimensional Projection
A tendency to see objects and patterns as three-dimensional when certain visual cues are present.
People have evolved to see things as three-dimensional whenever possible—even when the things are clearly not three-dimensional. The following visual cues are commonly used to encourage the perception of three-dimensional relationships:1
Interposition
When two overlapping objects are presented, the overlapped object is perceived to be farther away than the overlapping object.
Size
When two similar objects of different size are presented together, the smaller object is perceived to be farther away than the larger object. The size of familiar objects can also be used to indicate the size and depth of unfamiliar objects. ...
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