Detective Noir — Procedural Murder Mystery (3D)
Smoke-filled rooms, fedoras, fog. Every case unique. Every reveal stings.
What this is
A procedurally generated 3D murder mystery that plays out in 4 acts every loop. Every case is a fresh combination — detective, victim, killer, motive, weapon, location — and the generator runs a solvability check so the killer always points uniquely to the hard evidence. Then it pours noir on top: fedoras, trench coats, fog, single-spotlight rooms, ken-burns orbits, typewriter notebooks.
Why this is mind-blowing
The whole Knives Out / Columbo loop is here, on autopilot, in a single HTML file. The generator picks a detective from a pool of four (Cole Reeves, Maxine Vance, Reggie Hart, Vera Lou). It picks a victim, a killer, a motive, a weapon, and a setting. It then plants 4 hard clues that uniquely identify the killer plus 1 red herring. Act I shows the body at one of 8 procedurally built locations. Act II tours four scenes — precinct, morgue, lounge, suspect's hideout — interviewing suspects with typewriter dialogue. Act III delivers a stakes twist (mob retaliation, witness flips, alibi cracks). Act IV gathers everyone in the mansion, dismisses the innocents one by one with strikethroughs on the suspect board, then names the killer in 36-point block letters as cuffs flash on screen. CASE CLOSED. Hold ten seconds. Generate a new case. Forever.
It's a watchable detective show that never re-runs the same episode twice, and it ships in 44 KB.
Prompt
A 3D autoplay murder mystery in a noir city. Procedural cases — every run a new detective, victim, killer, motive, weapon, location. 4 acts: discovery at the body, investigation tour through 4 locations interviewing suspects, a stakes twist (mob retaliation, witness flips, alibi cracks, red herring exposed), then mansion reveal where suspects are dismissed one by one until the killer is named and cuffed. Low-poly fedora-and-trenchcoat humanoids, 8 location builders (crime, precinct, morgue, lounge, mansion, docks, street, hotel), single-spotlight noir lighting with fog, ken-burns slow orbit. Typewriter notebook overlay, suspect board with strikethroughs, evidence locker. Auto-restart forever.Paste this into Claude, Cursor, or Copilot. Change one thing that matters to you.
What I learned shipping it
- Solvability checks make procedural mysteries feel fair — the killer must point uniquely to the hard evidence; red herrings are explicitly tagged.
- Noir is one bright key + a lot of dark: SpotLight + low Ambient + FogExp2 sells the genre faster than any texture.
- Acts give shape to autoplay — Discovery / Investigation / Twist / Reveal beats keep a 5-minute mystery from feeling like a screensaver.