Solid objects do not change size or shape, but our retinal image of these objects changes depending on our viewing distance or angle. Being able to recognize an object across different perspectives is referred to as:

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Viewpoint invariance refers to the ability to recognize an object across different viewpoints or perspectives. This ability is related to the brain’s ability to extract invariant features of an object, such as its overall shape, even when the retinal image is changing. Illusionary contours refer to the perception of edges that are not actually present in the visual stimulus, while good gestalt and good continuation refer to principles of perceptual organization that help us form coherent perceptual wholes from disparate visual elements.

Solid Objects Do Not Change Size or Shape, but Our