/**
Cube map texture, consisting of six square faces. All of the faces must be of
the same size. A cube map texture is addressed by three-dimensional texture
-coordinates. The face is first selected according to the largest coordinate,
-and the remaining two coordinates are used to sample the face image.
+coordinates, with a principal range of [-1, 1]. The face is first selected
+according to the largest coordinate, and the remaining two coordinates are used
+to sample the face image.
All faces of a cube map texture must be allocated for it to be usable.