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How would I perform Boolean operations (either directly or as a modifier), not on two (closed) meshes, but on the two Catmull-Clark limit surfaces they represent, such that the result is another Catmull-Clark control surface (with proper edge and vertex crease values) whose Catmull-Clark limit surface is the result of the Boolean operation on the two input limit surfaces.

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  • $\begingroup$ As I understand your question, wouldn't that need to apply a reverse catmull-clark algorithm to the resulting boolean shape? I don't think Blender has this ability now. researchgate.net/publication/… $\endgroup$
    – m.ardito
    Commented Feb 1, 2017 at 8:13
  • $\begingroup$ Your observation about needing to implement a reverse Catmull-Clark(CC) is only somewhat correct. The obvious way to think of the problem is 1) apply the CC, 2) perform the Boolean operation, then 3) apply a reverse CC. This misses two things: The CC limit surface is infinitely subdivided, so it can't be represented as an (in memory) mesh, and; Except for the interface curves where the limit surfaces meet, all the control points you need for the resulting mesh should already exist in one of the input control meshes. The only reverse CC would be on the interface curves. $\endgroup$ Commented Feb 3, 2017 at 3:18

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