1. One such addition is GPU tessellation.

2. The result of tessellation is deterministic and therefore well adapted to many CAD situations.

3. Note: Terrain tessellation currently does not use contour lines and spot elevations as elevation source.

4. Tessellation of simple surfaces such as spheres andcylinders is not difficult.

5. An octahedral tessellation approximates a spherewith an octahedron whose vertices are all on the unIt'sphere.

6. Filling up space completely with almost no gaps in between is called tessellation.