Roblox deployed Cube 3D, a proprietary generative AI foundation model that creates fully textured 3D objects and environments from text prompts, available to game creators inside Roblox Studio starting March 2025. In February 2026, Roblox introduced '4D generation,' adding interactive behaviors so AI-generated objects function dynamically within games.

Cube 3D is a 1.8-billion-parameter foundation model trained on 1.5 million 3D assets, capable of tokenizing 3D shapes and predicting the next shape token to build complete objects, an approach analogous to how large language models predict text tokens. The model was open-sourced on GitHub and HuggingFace in March 2025. The beta mesh generation API inside Roblox Studio lets creators type a text prompt (e.g., '/generate a motorcycle') and receive a 3D mesh object within seconds. The April 2026 agentic update to Roblox Assistant integrates Mesh Generation and the new Procedural Model Generation tool into a broader planning and building workflow. By February 2026, Roblox reported that Cube 3D had generated over 1.8 million 3D objects since launch; separately, more than 160,000 objects were generated during the early-access phase of the 4D generation feature specifically.