Foldable quboid (customizable)
thingiverse
While I found a few foldable cuboids that could be folded into various shapes, none of them offered customization options to print them in different sizes. However, the following parameters can be customized: a: The length of the cuboid b: The width of the cuboid c: The height of the cuboid h1: The thickness of the sides h2: The thickness of the folded area e: The width of the extra area needed for folding (0.1 and 0.2 mm both worked well for me) angmod: A modifier for the angles of the connecting edges (3 was a good starting point, resulting in angles of 42° and 48°, but other values might work even better)
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