I see rs.UnifyMeshNormals, but not Rebuild. There is the RhinoCommon Mesh.RebuildNormals
method, but maybe there should also be a rs shell made available (unless I missed where it is…)?
Something like this:
def RebuildMeshNormals(meshID):
mesh=rs.coercemesh(meshID)
mesh.RebuildNormals()
sc.doc.Objects.Replace(meshID,mesh)