[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)
Effects the size of the border around obstacles. Many path planners (including CAINav) treat agents as a point on the navigation mesh. So the navigation mesh needs to be eroded by the agent's radius so the planner won't plan a path that comes too close to obstructions, or passes through areas that are too thin for the agent to fit.
Start with a value of ceil(maxAgentRadius / XZCellSize). A value of zero is not recommended.