#procedural

When the world is deterministically generated from a spec, a save is {version, spec, edits[]}, never a geometry snapshot. Load = validate → regenerate → replay edits. Same format works for save, co-op edit sync, and late-join replay.

The method for large runtime-generated terrain in s&box: a persistent cell grid as the single source of truth, chunked greedy meshing (tops + skirts), collision decoupled from render grain, palette-atlas UVs, and dirty-chunk remesh for a live terrain brush.

Per-cell dither or contour-wander in a greedy voxel mesher turns cliff skirts into vertical stripes: detect walls and key strata on raw height bands with dither neutralised.

Lifting a flat overlay clear of the ground is only half the rule. Overlays also z-fight each other, and a full-lap overlay on a self-crossing path z-fights itself, which no single lift value can fix.

A per-cell white-noise hash for terrain shade choice reads as a 50/50 checkerboard. Use a smooth low-frequency noise field instead, confining the hash to threshold-edge dithering.