The world size for each texcoord mapping. Used by the texture streaming.
Editor Properties: (see get_editor_property/set_editor_property)
local_uv_densities(float): [Read-Write] The UV density in the mesh, before any transform scaling, in world unit per UV. This value represents the length taken to cover a full UV unit.
override_densities(bool): [Read-Write] Whether this values was set manually or is auto generated.