An Intrinsic Mesh can be thought of as a mesh that overlays another mesh, sharing the original surface. The edges of the intrinsic mesh are constrained to be on the original mesh surface, but need not align with the original mesh edges. The lengths of the intrinsic edges are measured on the surface of the original mesh (not the R3 distance). The original mesh vertices are a subset of the intrinsic mesh vertices and intrinsic edge splits and triangle pokes may introduce new intrinsic mesh vertices.