These fabric-covered origami sculptures become shelf fungi that live among books. They can go vertically between pages as a bookmark, or fold horizontally to peek out between books on a shelf.
Inside is a plastic sheet with curved folding lines cut on a craft cutting machine. Curved origami leads to organic shapes like the mushrooms above and the other shapes shown below.
The plastic sheets can’t really form true domes, hills, and spheres because that requires stretching, but combining a few curved folds can lead to dome-like shapes.
Since curved origami is a little time-consuming to fold by hand, the shelf fungus design uses a bit of pre-stretched elastic to get the folding started. The fabric also makes hinges that don’t wear out easily so they can be folded and refolded through more cycles. This kind of hinge is useful in other objects such as this soft, reclosable little box, made from a mesh fabric bonded to the plastic with an adhesive sheet:
