Populate:Terrain assists in creating and optimizing terrain surfaces from contour lines or from existing meshes. The quad based output allows for easier later remodeling, for example using push/pull painting. The regular face size reduces rendering issues (GI, displacement) and you can use Turbosmooth on it.
Populate:Terrain is a scripted plugin for Autodesk 3ds max. It assists in creating and optimizing terrain surfaces for architectural visualization applications. Populate:Terrain fixes imported meshed CAD models or directly converts contour lines. The result is a clean quad based poly surface with user definable grid size.
1: Spline Shape 2: Converted to mesh with 3ds max 3: Converted with Populate:Terrain
1: Contour lines 2: Converted using the 3ds max Terrain Compound 3: Converted with Populate:Terrain
New feature in 1.8, trimming with a spline shape: