3 useful cones

These 3 cones unroll to 270, 180 and 90 degrees, which can be useful if you want to line up an orthogonal pattern. For example rectangular plywood sheets.


Self intersecting developable surfaces

Some sketch models:
The idea is to create one continous, developable, self intersecting surface that can create a useful space (a room) and perhaps extend to become a whole building. The surface is allowed to overlap itself when unrolled.