A skydome is also a
construct used in some
3D video games as a simple, but effective method for representing... the
sky.
It typically consists of a collection of triangles and/or quadrilaterals arranged in the shape of a hemisphere. This will then be textured with clouds, stars etc. During gameplay the skydome will be positioned above the game world at a distance and scale sufficient to provide the illusion of a sky that stretches beyond the horizon.