Valleys and mountains (IMAGE)
Caption
In origami, there are two main types of creases used: valley folds and mountain folds. In each case, the paper is folded either inwards or outwards. To make these folds, gaps are left on one side of the heat-shrink sheet to allow for that part of the sheet to fold inwards, like a valley, or outwards, like a mountain, when heat is applied.
Credit
©2023 Narumi et al. CC-BY-ND
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Credit must be given to the creator. No derivatives or adaptations of the work are permitted.
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CC BY-ND