Claude Fable 5.1 Generates Browser Model Train Yard

@holytrinity posted a screen recording of an interactive 3D voxel-art HO-scale model train yard titled IRON HARBOR JUNCTION. The post states Claude Fable 5.1 produced the Three.js scene shown at eye level on a wooden table. The author described the output as impressive and noted it was fun to play with the controls. A prompt was referenced below the tweet. The post was retweeted by @DanielleFong.