The ChairPlot module is another alternative way of visualizing
3D volume data. The volume is displayed with 3 orthogonal
slice planes, with the exterior boundary filled in behind,
so it looks like a section has been removed from a corner of the
volume. It is similar to excavate brick, except that it
makes 2D polygons, with UV texture coordinates and resamples
the input data into 2D images that glue onto the slice sections.
This way, 2D texture map facilities are used, rather than 3D texture.
Several hardware vendors, notably E&S, SGI, Kubota, Vistra, etc.,
have hardware support for this type of texture mapping.
The software renderer also has support for this mode, where no
accelerator is available.
The controls are virtually identical to excavate brick.