Marble by World Labs

Marble is World Labs' system for creating explorable 3D environments from text, images, video, panoramas, or rough spatial layouts. It tries to construct a whole place rather than a single object, with enough visual continuity for you to move through it. Once a world exists, you can extend its boundaries, combine it with another scene, make targeted edits, and guide the layout with a coarse 3D blockout in Chisel. The app gives most of the screen to the world itself, keeping creation and editing controls compact around the viewer.

The export and editing tools make Marble feel more useful than a closed research demo. A world can leave the service as Gaussian splats, panoramas, meshes, collider geometry, or rendered video. Fine geometry can still soften, distant areas may lose detail, and the best showcase worlds set expectations ordinary generations may not meet. That makes Marble strongest for ideation, virtual production, location concepts, and exploratory scenes before final modelling and cleanup. Even with those limits, it represents a real change in medium: the prompt no longer ends at a frame.