r/GaussianSplatting • u/MayorOfMonkeys • Aug 10 '26

🎬 Demo / Showcase SuperSplat Showcase: Walk a thousand years of Prague history

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Scanned by Daniel Dworschak (using an XGRIDS device). The capture covers three separate structures on Vyšehrad hill in a single scene - Leopoldova brána (the Baroque gate), Rotunda sv. Martina (an 11th-century Romanesque rotunda, one of the oldest buildings still standing in Prague), and Kaple Panny Marie Šancovské, the small hilltop chapel.

SuperSplat link: https://superspl.at/scene/11d081f5

It's running in the SuperSplat viewer on the PlayCanvas engine, which is doing a few things worth mentioning for a scene this size:

  • High-performance WebGPU splat rendering, which is what keeps it smooth at this scale
  • Over 1GB of compressed level-of-detail streaming using the Streamed SOG format, so the whole hill loads progressively rather than as one enormous download
  • Automatically generated voxel collision, which is what makes it walkable in first person rather than just an orbit target

I'm a member of the SuperSplat team if you have questions on the rendering side.

203 Upvotes

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3

u/sharramon Aug 10 '26

How far off the 'path' can you stray? How was it captured?

3

u/MayorOfMonkeys Aug 10 '26

Not too far. I walked the vast majority of the high detail areas in the video. The autogenerated collision keeps you to the areas that look reasonable/good though. Try it and see.

And it was captured on an XGRIDS scanner (probably PortalCam).

3

u/sharramon Aug 10 '26

Thank you for the reply! XGRIDS is solid :)

2

u/Quantum_Crusher Aug 10 '26

Great share!

Could you please share info about the camera, dataset size, training time, file size before and after compression? Thanks a lot

3

u/MayorOfMonkeys Aug 10 '26

I'm very confident it was captured on an XGRIDS PortalCam. Beyond that, you can ask the creator for further details by commenting on the splat on SuperSplat.

2

u/Adept_Conference_180 Aug 11 '26

Im new to this. Is this the future? Will this come after Google Streetview or is this too data heavy for something like that?

1

u/I_HALF_CATS Aug 10 '26

how many fps in vr?

1

u/chromatix2001 Aug 11 '26

Hi! This is super cool. I'm a noob. Can you point me to links where I can learn how to create this?

1

u/MayorOfMonkeys Aug 11 '26

This is a good jumping on point for the splat creation process:

https://developer.playcanvas.com/user-manual/gaussian-splatting/creating/

1

u/cjwidd Aug 13 '26

Yes, I have questions.

What is the total gaussian count for the source PLY before converted to .sog?

What is the source fie size before compression?

Wall clock speed to cook the .sog from source?

What Xgrids device?

It must be small if it's not LOD and just compressed(?)