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This paper describes a framework for introducing visually smooth surfaces into sketch-based freeform modeling systems. An existing sketch-based freeform modeling system generates rough polygonal meshes with uneven triangulations after each operation. Our approach generates a dense, visually smooth polygonal mesh by beautifying and refining the original rough mesh. A beautification process generates near-equilateral triangles with a near-uniform distribution of vertices to mask the noise and baddoi:10.1145/1185657.1185774 dblp:conf/siggraph/IgarashiH06a fatcat:5kcsvnrnynaqboxv6lhlyqoome