About Modeling a TerrainThere are a few concepts you need to understand when working with the Terrain Preparation app. Modeling a terrain involves importing an external file that contains clouds of points or a mesh. You can then use the 2D Mesher to mesh clouds of points, use contours or regenerate a mesh. The result is an accurate 3D representation of a terrain's surface. 3D Shape and Product WorldsIn Terrain Preparation, you work in two complementary worlds. The Terrain Preparation app operates inside a 3D shape. It provides tools that create or modify objects inside solid bodies or (ordered) geometrical sets. Most objects managed in Terrain Preparation are meshes or cloud of points. In the 3D shape world, you draw geometry, and create and modify shapes. In the product world, you create and compose environments as well as move and position 3D parts and products. A combination of an active structure level, a selection mode, and a type of view help you identify the world in which you are working. When you enter the Terrain Preparation app, a 3D part (terrain object) along with its 3D shape is created. About Terrain PreparationThis section provides background information about the preparation process. Preparing a terrain consists of cleaning meshes that can present some irregularities or fixing structural problems. Before running a preparation process, you must import a terrain file, mesh the cloud of points or regenerate the mesh (using Create Terrain or Create from Contour Lines commands). Key TermsThere are a few concepts you need to understand when working with the Terrain Preparation app. There are two ways to create a terrain: either from a cloud of points using the 2D Mesher or from contour lines.
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