TRIA is a data directory which contains examples of TRIA files. TRI files are a simple "homegrown" triangle mesh description of a 3D surface, in ASCII format.
The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.
CUBE is data defining a cube.
TILER_3D is an example of a 3d tiling pattern created by TILER_3D.
You can go up one level to the DATA page.