Terra (terra.zip) , created by the mapper , is a highly-regarded "old school" map pack for
The software was originally created by a solo developer known online as "GreyMesh." Frustrated with the high cost of professional terrain tools like Bryce or Vue, GreyMesh wrote Terra from scratch using C++ and OpenGL. Version 3.6, packed into , was the last freeware version before the project went commercial (and subsequently, abandoned in 2008).
Right-click the file and select "Extract All" to a dedicated folder.