A note on 2.5D, 3/4 Perspective and pseudo-3D

2.5D ("two-and-a-half-dimensional"), 3/4 perspective and pseudo-3D are terms used to describe either:

• graphical projections and techniques which cause a series of images or scenes to fake or appear to be three-dimensional (3D) when in fact they are not, or
• gameplay in an otherwise three-dimensional video game that is restricted to a two-dimensional plane.

Common in video games, these projections have also been useful in geographic visualization (GVIS) to help understand visual-cognitive spatial representations or 3D visualization.

The terms 3/4 perspective and 3/4 view trace their origins to portraiture and facial recognition, where they are used to describe a view of a person's face which is partway between a frontal view and a side view.

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