This map shows signal calculations in an area near water, demonstrating how T3D allows the use of transparent signal overlay.

Here is a 3D map of a small radio station's coverage in Iowa.

This wireframe map shows the population density for the New York City area.  T3D's census data is taken from a 200MB 1990 census block database.

Using Terrain-3D's gradient signal shading Longley/Rice signal calculations can be drawn so that the colors fade gradually from one cutoff to another.