3D pixel-art floating-island sumo arena diorama

[Note: the creator shared a partial prompt. Wording below is theirs.] GOAL: Build "Shrine Dohyō" — a single-page real-time 3D pixel-art diorama (three.js r160 via import map from jsDelivr, one self-contained HTML file, English UI), in the same engine as my other floating-island scenes: an orthographic camera at 31° turned in quarter steps (drag/arrow keys), wheel/pinch zoom, a low-res render target with no AA snapped to whole pixels, depth-based outlines, every pixel snapped to the nearest of ~80 palette colours in OKLab, optional Bayer dither, a "Raw 3D" toggle, pixel-size slider, a cutaway that hides tall things between camera and action, and a "Close up" follow camera. MOTION: SCENE: a village shrine on a floating island (turf, earth, rock strata, hanging roots, stone steps up to a vermilion torii) in cherry-blossom time. Centre: a clay dohyō 60 cm high with sloping sides, 6.7 m top, a ring of 20 straw bales 4.6 m across plus 4 bales set out at the compass points, a sand band, two white shikiri lines, steps on three sides, salt boxes and water buckets; above it a shrine roof on four posts painted green/red/white/black, purple drape, four great tassels, sacred rope (roof auto-hides in close-up, toggle). Shrine hall to the north (veranda, vermilion pillars, tiled roof, crossed boards and ridge logs, sacred rope, bell). Tall nobori banners in each wrestler's colours along the south path; straw mats where ~100 villagers kneel on cushions (instanced boxes); wrestlers' benches with curtains in the two northern corners; a drum tower with a drummer; a tea bench under a red parasol by a koi pond; stone lanterns; six cherry trees shedding up to 1,200 instanced petals that flutter with a gusting wind, settle on grass, mats and clay, and are swept off the ring by brooms. Afternoon and Dusk lighting (lanterns lit; the page background changes with it) and Few / Bloom / Storm petal levels. PEOPLE: wrestlers as ~40-box rigs (deep belly and chest, thick limbs, mawashi with knot, rear strip and hanging sagari, ginkgo-leaf topknot, ceremonial apron, the grand champion's white rope with paper zigzags) posed every frame from wanted hip height, lean, roll, chest twist, foot and hand targets with two-bone IK. Referee (gyoji) in a purple robe and tall black hat with a gold war-fan; callers (yobidashi) in indigo; two judges kneeling; a priest; tea-bench villagers; a sleeping cat. TOURNAMENT: 8 invented wrestlers (Yokozuna, Ozeki, Sekiwake, Komusubi, Maegashira 1–4) with weight, power, speed, technique, footing, style (pushing / belt / technical) and preferred grip. 7 days, round robin, lowest ranks first, champion last. A director coroutine runs each day: tower drum, side ring-entering (days 1 and 7), the champion's ring-entering (claps, two big stamps, rising with arms spread). Each bout: wrestlers come to cushions beside the ring; the caller climbs up and sings both names; they climb to their corners; squat, clap, show the hands; shiko stamps with dust; optional prize banners paraded round the ring; 2–3 shikiri rounds (salt throw, crouch