|Show Wireframe – Show the mesh wireframe in the scene window.
Build Tangents – Build mesh tangents, used in some shaders. This can be a little slow in calculating.
Build Lightmap UVs – Build the atlased second set of UVs to be used with Beast lightmapping.
Optimise Mesh for Runtime – Perform some mesh optimisations to ensure they render faster at runtime.
Force Full Rebuild of Track – DEBUG: Used to force rebuild the whole track regardless of it being edited. The track will only rebuild sections that have been modified by user to speed up editing.