Before you start, it is recommended to get acquainted with the Terrain Processor User Manual. The tutorial is accompanied with the sample map project containing source data, Terrain Builder (TB) and Terrain Processor (TP) projects. This tutorial explains the basic usage of Terrain Processor and publicly available vector geographic data from OpenStreetMap (OSM) in making terrains for Arma 3, and also introduces map makers to possible use of geographic data in their work. 8.1 OpenLayers (Web > OpenLayers plugin).7 Generating Map Content in TP: Forests etc.6 Acquiring and Processing the Vector Data.5 Terrain Base: Heightmap and Supertextures.