[This is preliminary documentation and is subject to change.]
Assembly: cai-nmgen (in cai-nmgen.dll) Version: 0.4.0.0 (0.4.0.0)
The border size exists primarily to support multi-tile meshes and is usually set to zero for single-tile meshes.
Determining the exact value to use for multi-tile meshes can be tricky. It is best to set all the other parameters, then use DeriveBorderSize(NMGenParams) to get an initial value.