Rhino will produce one nurb patch per sub-d face for all quads even at star points, except for “triangles”, which become three smaller nurb patches to maintain continuity. Nurb conversion is very different between the three programs, with Clayoo producing at least four patches per sub-d face similar to polygon based programs such as Lightwave or MODO, except in nurb format. As far as I know, all three are based on the Catmull Clark subdivision system, so the sub-d smoothing part should similar, except T-splines treats “star points”, and “triangles” a little different than the other two, and will not produce G2 continuity at these junctions. ![]() I’ve played more with Rhino and Clayoo sub-d conversion than T-Splines or Fusion, but here’s my take on the differences.
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