Spark 2.0 - A streaming engine for huge 3D Gaussian worlds

Hi everyone!

Traditional 3D modeling builds surfaces piece by piece with texture-mapped triangles. 3D Gaussian Splatting uses millions of semi-transparent ellipsoids (splats) that blend together to create hyper-realistic detail. Spark 2.0 takes this further with a streamable LoD system.

Built on Three.js and WebGL2, Spark 2.0 is not just rendering splat scenes, it is turning them into something you can actually stream, refine, and interact with across desktop, iOS, Android, and VR.

With .RAD streaming, progressive refinement, and virtual-memory-style splat paging, World Labs is pushing toward 100M+ splat worlds that stay explorable on everyday devices.

For example, the Coit Tower scene (over 40 million splats) runs fully interactive in the browser:

World Labs also provides richer worlds you can explore with the same smooth, real-time interaction — all directly in the browser!

I saw on social media earlier that it was open source... but actually, it's not.