1. A system for generating a representation having a hierarchical region-based organization for a mesh, such system receiving an input mesh, the system comprising: means for sub-dividing the input mesh into plural sub-regions; means for identifying a plurality of operations per sub-region simplifying the sub-regions; and means for storing, in the representation having a hierarchical region-based organization, data indicating a plurality of refinement operations derived from the plurality of operations per sub-region simplifying the sub-regions, wherein the storing comprises grouping the data indicating the plurality of refinement operations according to the sub-region within the input mesh whereat the refinement operations operate.