Build a mid-engine hypercar in CAD at the level of the most beautiful cars ever designed. It should be utterly perfect — every surface, every shutline, every wheel spoke resolved to concept-car-reveal quality, from the front fascia to the suspension links to anything you could think of. AESTHETICS ARE THE PRIMARY OBJECTIVE. The model must contain every part a real car has. But this is not an engineering exercise — wherever beauty and function conflict, choose beauty. Do not let packaging, manufacturability, or realism dilute the design. It has to be the kind of thing people stop scrolling for. PACKAGE ~4700mm long, ~2050mm wide, ~1150mm tall, 2700mm wheelbase, 21" front / 22" rear wheels. Adjust freely if it looks better. PARTS (every one of these exists as a real body) Body: front fascia, front splitter, hood, front fenders, doors, side intakes, rocker, rear fenders, engine cover, rear fascia, diffuser, rear wing. Glazing: windshield, side glass, rear screen, headlight and taillight lenses. Lighting: headlight internals, DRL signature, taillight internals. Chassis: monocoque tub, front and rear subframes, crash structures. Suspension: upper and lower wishbones, uprights, pushrods, rockers, coilovers, anti-roll bars — all four corners. Wheels: rims, tires, brake discs, calipers, hubs. Powertrain: engine block, heads, intake plenum, exhaust system, transaxle, driveshafts. Interior: seats, steering wheel, dashboard, center console, pedals, door cards. Detail: mirrors, badges, fuel filler, vents, fasteners where visible. DOORS — NON-STANDARD MECHANISM Use a dihedral synchro-helix: the door rotates outward while simultaneously sweeping upward and forward along a helical path, so it lifts clear of the body without ever swinging wide. Not a scissor door, not a butterfly, not a gullwing. Design a visible, sculptural hinge mechanism that is itself beautiful — it should look like jewelry. The motion is the hook; make it read as impossible on first viewing. GAUNTLET LOOP Break the car into the smallest parts that can be judged independently. Give each part its own specialist builder subagent AND its own critic subagent. Critic rules: - Fresh context every time. Renders only. Never show a critic the builder's code, reasoning, or history. - Blind A/B: our render against a reference render of a flagship hypercar or concept car, unlabeled, random order. - The critic's only question is "which of these is more beautiful." Pass only if ours wins on its own merits. - On a loss, name exactly ONE gap — the largest — in visual terms, and send it back to the builder. - Critics judge parts in context of the whole car, not in isolation. A gorgeous wheel that fights the body is a fail. Run a final whole-car gauntlet after every part passes: a fresh critic blind-A/Bs the complete car against the reference set from the front three-quarter, rear three-quarter, side, and top. All four views must win. AESTHETIC RUBRIC (priority order) 1. Silhouette reads as a striking solid black shape at thumbnail size 2. Highlight and reflection lines run continuously across panel breaks with no unintended kinks 3. Feature lines terminate deliberately — into another line, an edge, or a shutline. Never fading into nothing. 4. Wheel-to-arch relationship: gap, tuck, section width look planted 5. G2 continuity where the eye expects smooth; creases deliberate and razor sharp 6. Greenhouse graphic: DLO shape, pillar thickness, tumblehome 7. Surface tension — no slack, no bloat, no dead flat areas 8. Zero faceting, zero missing fillets, zero unblended intersections at render resolution VALIDATION (throughout) Every gen_step_part exits 0. cadref inspect reports watertight solids with no self-intersections. The full assembly loads in CAD Viewer and you return the link. Do not weaken or drop any check to declare victory — if something fails, fix the model.