BlockWorld

Generation

• Multi-noise terrain — continentalness, peaks-and-valleys, erosion, plus a per-biome 3D cliff perturbation for overhangs
• Ten biomes, with domain-warped temperature and moisture so borders snake instead of tracing contours
• Rivers carved by ridge noise with elevation falloff, so they follow valleys rather than cutting through mountains
• A three-layer cave system: cheese rooms, spaghetti tunnels, noodle worms, and rare vertical shafts
• Separate sky-light and block-light breadth-first floods, giving an O(1) per-face brightness sample

Meshing

A greedy 2D mesher collapses adjacent faces across all six cube directions. The subtlety is ambient occlusion: per-vertex AO is baked into the merge key, so two cells only combine when their AO patterns match and the merged output stays pixel-identical to per-cell meshing.

Tile identity rides along as a per-vertex attribute; the shader looks the atlas rect up from a uniform table and wraps the texture across merged quads with fract(). No texture array, no per-vertex rect payload.

Render

• 4×4 chunk groups merged into one BufferGeometry — the ~2,000 to ~128 draw-call win
• Block edits patch their slot in place via partial bufferSubData rather than re-merging the group
• Day and night driven entirely by a shared uniform scaling baked vertex light, so the cycle costs zero chunk rebuilds
• Water animated from 32 pre-baked frames UV-scrolled by time, instead of per-frame canvas work
• Three-tier LOD: full detail near the player, terrain-only at range, solid hills at the far edge