Worlds built
from evidence.

For simulation developers: turn video evidence
into environments you can inspect and test.

Explore environments
Fine paths converge into a single yellow ball. A conceptual illustration, not measured trajectories.

Environments

A video. A world you can change.

Try your own video

Watch the observation beside its reconstruction. Then change an action and see what follows.

Start with your own video

An observation in. An environment to explore.

For now: one yellow ball rolling horizontally, a fixed camera, and a clear view of the whole ball. MP4, up to 10 MB and 15 seconds.

Private result · files expire after 24 hours

Choose a video to begin.

Research

An environment, not just a replay.

Weft connects observation, simulation, and learning. The aim is a world we can inspect and challenge — and repair when the evidence disagrees.

The current model supports one isolated ball moving horizontally. General video reconstruction and multi-object worlds remain research goals.