Wrap PathList.CreateMesh() with a request class - preparing to generate and destroy the meshes when the rail segments are loaded by WorldGrid instead of generating all rail meshes at startup and keeping them in memory for the whole session - proxy the normal CreateMesh() method to use the "job" class internally (even though it runs on worker threads instead of the job system) - switched to the NativeArray mesh building methods instead of using MeshCache.Data for storage