Pokémon of the Forest's opening chapter — pick a starter, catch three research bugs, upgrade your net, cross the meadow, find rare bait, defeat the guardian — runs on a single ChapterDirector class that accepts a discriminated-union event and either advances a step, mutates a side condition, or rejects the event with a typed error code. No flags scattered across the codebase, no "did we already do this" audits, no invalid save states.
Pokémon of the Forest ships no GLB files, no PNG textures, no baked normal maps. Every creature is marching-cubes-meshed from Wyvill metaballs at boot; every leaf is a 2D-canvas Bézier fill baked into a CanvasTexture; every terrain patch is an analytic heightfield sampled onto a PlaneGeometry; every skin material is a MeshPhysicalMaterial with a custom subsurface-wrap term injected via onBeforeCompile. This post walks the seven techniques that let a browser game with ~24k lines of TypeScript render Pallet Town without downloading a single texture.
