Solid Garden

Why it does not fall apart. Two cells that are diagonal neighbours on consecutive layers touch along a single vertical edge — a zero-thickness hinge that reports as connected and prints as two pieces. interpolate: 'bridge' inserts exactly the set that turns that contact into a real face, and under a vacuum-stable rule that is enough to guarantee every voxel is connected down to the build plate. The rules below are all vacuum-stable, which is why the report keeps saying one piece, nothing floating.

The boundary is a cut, not a wrap. The simulation is toroidal; a printed object cannot be. Features are cut at the grid edge, and two pieces touching only across the seam are two pieces — the extruder culls against an open-boundary neighbour table so those faces stay real, exposed surface instead of holes.