Divide Into Grid: Divides the meta mesh into grids, and adds all the generated section meshes to the submeshes.
Remove Redundant Vertices: The name implies what it does.
Recompute Normals: While importing the meta mesh, computes normal vectors for all sub-meshes instead of importing them as well.
Normal Computation: Decides whether the normal vector computation will depend on the face area (weighted) or not (default).
Recompute Tangents: While importing the meta mesh, computes the tangent vectors for all sub-meshes instead of importing them as well.
Whiten: Linear interpolation amount between the vertex color and white per each color channel.
All the active sub-meshes of the meta mesh can be seen here. The material properties, mesh parameters and tags can be changed via the interface.
This shows the activity situation of the sub-meshes. If the ignore checkbox is checked, this means that the corresponding sub-mesh is inactive. After changing status of the lod meshes, please press “Apply Ignores” button for your changes to take place and be saved.