Foldline Proof Rack
Test Kawasaki and Maekawa local flat-foldability conditions on one suspended mathematical sheet, then confront the global-proof boundary.
More geometry creations
Solstice Courtyard
Walk a geometric year through four stone season gates and measure axial tilt, ideal daylight and solar-noon shadows.
Elin351
Snell Plumb Facet Lantern
Seat two declared index plaques, tilt one local facet, and tension exact ideal Snell-law ray threads through four slope controls.
Elin60
Registration Screen Atelier
Overlay measured ideal line gratings and pull proofs of their geometric moiré spacing.
Elin50
Terminator Shadow Meridian Drum
Set a frozen teaching instant, rotate a declared Sun-vector cam, and classify six synthetic spherical cells while real data stays blocked.
Elin40
Halo Cold Chamber
Rotate a 3D hexagonal ice crystal, catch refracted rays, resolve the spectral minimum, and build an honest atmospheric halo ensemble.
Elan30
Throat Ring Embedding Foundry
Forge and gauge one exact Morris–Thorne/Ellis equatorial spatial embedding profile.
Elin30