WorldGen was proposed by Meta in November 2025, and the relevant research results were published in the paper "WorldGen: From Text to Traversable and Interactive 3D Worlds".

WorldGen can automatically create large-scale interactive 3D worlds directly from text prompts. This model translates natural language descriptions into movable, fully textured environments that can be instantly explored or edited within standard game engines. By combining large language model-driven scene layout reasoning, procedural generation, diffusion-based 3D generation, and object-aware scene decomposition, WorldGen bridges the gap between creative intent and functional virtual space—allowing creators to design coherent and navigable worlds without manual modeling or specialized 3D expertise.