Hemicube (computer graphics)

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See also Hemicube (geometry)

In 3D computer graphics rendering, a hemicube is one way to represent a 180° view from a surface or point in space.

Unfolding a hemicube

Shape[edit]

Although the name implies any half of a cube, a hemicube is usually a cube cut through a plane parallel to one of its faces. Therefore it consists of one square face, two 2:1 aspect ratio rectangles, and two 1:2 aspect ratio rectangles.

Uses[edit]

The hemicube may be used in the Radiosity algorithm or other Light Transport algorithms in order to determine the amount of light arriving at a particular point on a surface.

In some cases, a hemicube may be used in Environment Mapping or Reflection Mapping.