Build a Night train. Create an immersive animated browser scene with a moving passenger train at night, lit windows, passing scenery, convincing wheels and tracks, and atmospheric light. Include a cinematic camera and pause/replay controls. Deliver a working browser artifact. Source: https://x.com/EnvolDev/status/2103282586055213355 (111K views observed 2026-10-01). Adapted recreation brief based on the public post, not a verbatim original prompt or replication of its model versions. Use the models selected in Evals.