Drag a shape to turn only that one. Drag empty space to turn them all.
The bars at the screen edge pan the view. Top · flat looks straight down, which is
how the 2D figures read true.
In Stack, two families nest exactly: Seed ⊂ Fruit ⊂ Flower share one hex lattice,
and the octahedron's vertices are literally the tetrahedron's edge midpoints. Between
families there is no verified metric relation — that is superposition, not nesting.
The octa ↔ tesseract bridge is combinatorial, not metric: same six elements, not the
same six points.