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Anonymous
>>133386...all papercrafts are only mountain AND valley folds... You are correct, but that's not what OP said, he said: shapes/papercrafts that only involve mountain OR valley folds I think he means papercrafts that only have mountain folds, or papercrafts that only have valley folds (which is basically the same, only inside out or the other way around, depends on how you look at it lol) And I think OP answered his own question: polyhedra.
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