Andrej Karpathy Tests Claude Opus on 3D Lord of the Rings World, Gets 5,500 Lines of Procedural Code in Two Hours
AI researcher Andrej Karpathy gave Claude Opus the opening paragraph of The Lord of the Rings and asked it to create a Three.js 3D rendering of the story. The model worked for two hours and produced roughly 5,500 lines of procedural code, placing and animating polygon assets across a generated world. Karpathy argued the result shows AI moving beyond simple prompt-based tests into sustained creative engineering.