Glossary

World model glossary.

Concise definitions for the terms behind spatial AI, generative 3D worlds, physical AI, and interactive simulations.

Glossary2026-06-09

World model

World model definition: what AI world models are, how they differ from video generators, and why they matter for spatial AI, robotics, and 3D world generation.

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Glossary2026-06-09

Spatial AI

Spatial AI definition: AI systems that understand, generate, or reason about space, geometry, scenes, objects, and physical environments.

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Glossary2026-06-09

3D Gaussian Splatting

3D Gaussian Splatting definition for world models: a scene representation based on many rendered Gaussian splats, often used for fast photorealistic 3D viewing.

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Glossary2026-06-09

RGB-D

RGB-D definition: color plus depth data, used in world models, reconstruction, robotics, and spatial AI.

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Glossary2026-06-09

World foundation model

World foundation model definition: a foundation model for simulating, understanding, or generating physical or virtual environments.

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