Claude Opus 5.5 built this swimming club for 11.14$ Real 3D with a pixel-art look: swimmers in the lanes, a diving tower, poolside spectators and colourful parasols. You can rotate the scene, change the weather and watch the club light up at night

PROMPT: Build a single self-contained HTML page (no build step) called "Fluffy Mammoth": an interactive 3D woolly mammoth covered in long, shaggy, individually visible hair, standing in the snow. Use three.js r147 (UMD: cdn.jsdelivr.net/npm/three@0…) with custom ShaderMaterials. All UI text in English. Font: Onest (Google Fonts) with system fallbacks. SCENE - Icy sky: vertical gradient #C6DAE6 → #EDF3F6 → #D3E2EA as the scene background. A large soft snow patch on the floor (gentle radial falloff, no bright spot right behind the animal), a bluish-grey contact shadow under the mammoth, and ~280 slowly falling, drifting snowflakes (soft round points). - Camera FOV 30°, orbiting a target near the mammoth's centre, starting in a 3/4 front view with the head on the right; the whole animal including tusks fits the frame. - One key light from upper-left-front for the fur shaders, plus ambient/directional lights for the tusks and eyes. BODY (signed distance field → mesh) - Build the mammoth (facing +X, feet on y = −1.19) as a smooth union of soft solids: a big body ellipsoid, a high shoulder hump, a rounded rump, a head with a tall domed crown, small ears, four short thick legs (round cones), a short tail, and a trunk made of round cones tapering from 0.2 to 0.08, hanging down and curling forward at the tip. - Polygonize the SDF with surface nets (grid step ≈0.026), project vertices onto the surface, take normals from the SDF gradient, and orient all triangles outward. Show "Growing the fur…" while this runs. - Tusks: separate tapered ivory tubes along a Catmull-Rom curve that sweep down, outward, forward and back up and inward (Phong, vertex colours from a stained base to pale tips, faint growth rings, rounded tip). - Eyes: small glossy black beads with a white catchlight, placed on the head surface; the fur around them is very short and combed away from them. They blink every few seconds. FUR (crisp, never blurry) - Per-point fur fields computed in JS: length (0.26 base, up to ~0.58 as a long skirt hanging from the lower flanks and belly, 0.36 topknot on the crown, 0.09 face, ~0.06 trunk, 0.14 ears, a long tail tuft, nearly none at the eyes and soles, and never longer than the distance to the floor), stiffness, comb direction (back and down; topknot up and back; bangs falling forward on the face; along the trunk toward the tip), and colour (chestnut #8F4D26 to ginger #BD753D with low-frequency noise, darker legs, trunk and face, a few lighter and darker strands). - Long strands: ~120,000 camera-facing ribbons (instanced, 10 segments) scattered evenly over the skin by triangle area. Each follows a quadratic Bézier: out along the normal, then along the comb, then sagging with gravity according to its stiffness, plus a gentle wave along its length. Strands gather into locks by leaning toward a nearby "leader" strand toward their tips. Width tapers to the tip, with a minimum of ~0.55 px. Draw them SOLID and opaque (depth write on, no alpha, no alpha-to-coverage) and let the browser's multisampling smooth their edges. Clamp hair above the floor. - Short undercoat: ~20 shells offset up to 0.07 units, hair cells mapped triplanar in object space (cells ≈3.4 device pixels), alpha blended without depth write, faded out where the surface is seen edge-on. Dark skin underneath. - Shading: wrapped diffuse, Kajiya-Kay primary and shifted secondary highlights along the hair tangent, darker roots, occlusion lower on the body and inside the legs, a cool bounce light from the snow, a soft rim. Tips get only slightly lighter, so nothing burns out to white at the silhouette. LIFE & INTERACTION - All motion runs in the vertex shaders through one shared deform step used by skin, undercoat and strands: breathing (torso only), a slowly wandering trunk that bends more toward its tip, an occasional tail swish, and gentle wind gusts that move long hair more than short. - Drag to orbit the camera around the mammoth (with inertia; elevation clamped), wheel or pinch to zoom, double-click to reset, slow auto-orbit after 4 s idle. Arrow keys orbit, +/− zoom. - Hovering strokes the fur under the cursor (hit test by sphere-tracing the SDF, fur thickness included). - Click or tap the mammoth (or press Space) to make it shake like a wet dog: the upper body twists back and forth around its long axis with a decaying oscillation while the feet stay planted, the tusks and eyes follow the head, the trunk and tail flail, and the long hair lags behind and swings out through a damped spring. - Respect prefers-reduced-motion (no idle motion, no snow). QUALITY & ROBUSTNESS - Always render at full device pixel ratio (max 2). If frames are slow, first reduce undercoat shells (down to 8), then the number of strands (down to ~45%). - Bottom-left caption "Fluffy Mammoth" with the hint "Drag to look around · Scroll to zoom · Click the mammoth to make it shake" (touch: "Pinch to zoom", "Tap"), fading after the first interaction. Custom 46 px ring cursor. - Guard against a zero-sized container at load and recover from any non-finite camera state every frame. Show a small note if the WebGL context is lost, a shader fails to compile, or building the fur fails; a fallback message if WebGL is unavailable.

PROMPT Make a pixel-art 3D diorama of an open-air lido on a floating island, the same series and engine as my other pixel dioramas (three.js, orthographic isometric camera turned in quarter steps, small render target with no anti-aliasing snapped to whole pixels, depth-based outlines, a fixed 64-colour palette matched in OKLab, hard sun shadows, day/dusk/night, rain with puddles). Call it "Deep End". The lido: a 25 m four-lane lap pool (shallow end roped off for children, lane ropes whose floats ride the waves, backstroke flags, starting blocks) and a 5 m deep diving pool, with 1 m and 3 m springboards that bend and a 1930s concrete tower with platforms at 5, 7.5 and 10 m and an open stair. Around them: striped changing cabins with a clock, a kiosk, the judges' table, the lifeguard's high chair, loungers, parasols and umbrella pines. Real water: each pool is a height field run with the wave equation, so dives, strokes, raindrops and clicks make rings that reflect off the walls. The surface shades from its normals, with sun glints and a mirrored render of the scene; the tiled floor gets caustics. Dives are flown, not animated. The diver takes off with an upward speed and an angular momentum chosen to land the somersaults, the momentum is conserved through tuck, pike and straight shapes, and the body rotates about its real centre of mass, with twists about the spine. Kick-out timing errors tip the entry angle, which sets the splash and five judges' cards; drop the highest and lowest and multiply by DD. Run a six-diver, five-round meet on the 10 m platform or the 3 m springboard (with the approach and hurdle), with standings, then a medal moment, then free swim with pencil jumps, cannonballs and belly flops. Also: lap swimmers doing freestyle, breaststroke and backstroke with flip turns; divers who swim to a ladder, shower, sit in the hot tub and climb again; children who get whistled at for running; wet footprints on the deck that dry; pool lights glowing at night. Click the water to make a splash. English UI; must work on phones.

try it here: ChatGPT-6 Astra mouse-cube-lab.vercel.app/