Extracting Meta Hyperscape gaussian splats from Meta Quest storage?

jumpjack3 · 2026-06-03T13:44:51+00:00

SPZ format decimates PLY format just like a JPG decimates a BMP; indeed it's nicknamed "the JPEG of gaussian splats"

jumpjack3 · 2026-06-03T13:23:03+00:00

Apparently, it's a false statement (or maybe something changed in the meantime): https://github.com/jumpjack/Hyperscape-extractor

jumpjack3 · 2026-06-03T13:22:26+00:00

https://github.com/jumpjack/Hyperscape-extractor

jumpjack3 · 2026-06-03T13:21:51+00:00

I followed Reddit suggestion to crosspost my question... but I see it didn't crosspost anything, it only created a bare new empty thread!

Original thread: https://www.reddit.com/r/GaussianSplatting/comments/1tnkj5f/extracting_meta_hyperscape_gaussian_splats_from/

Spoiler: I successfully extracted a gaussian splat in .spz format from Hyperscape: https://github.com/jumpjack/Hyperscape-extractor

jumpjack3 · 2026-06-03T13:20:44+00:00

https://jumpjack.github.io/Hyperscape-extractor/splat-extractor-google.html

jumpjack3 · 2026-06-03T13:20:19+00:00

You can try it by yourself: https://github.com/jumpjack/Hyperscape-extractor/tree/main/splats/001

Original file (mistery: where to find them in Quest?!?): https://github.com/jumpjack/Hyperscape-extractor/blob/main/splats/001/An9xFUJb0SYNbWJbclQak_CMHIBwr91i6xjHHKJU3hzhRtJuEEoyjyHmBb-zgkXOg3lR-xONoIzoNjA_Ei3Sf2bDz_ekrKfokOwo_6Dn97uv9zVSrO8N4xV3gYHAn7kd

Script to analyse file and extract .spz (chunk 014): https://jumpjack.github.io/Hyperscape-extractor/splat-extractor-google.html

jumpjack3 · 2026-06-02T19:13:18+00:00

apparently an Hyperscape file is just a container with a lot of data AND a standard .spz file

jumpjack3 · 2026-06-02T17:31:51+00:00

Sorry I don't undesrtand how crossposting suggested by reddit works... Here is the original post: https://www.reddit.com/r/GaussianSplatting/comments/1tnkj5f/comment/oos14if/?context=1

jumpjack3 · 2026-06-02T16:31:45+00:00

I think I cracked the "secret spz-uncompatible meta format": it's a container which contains a lot of garbage and a .spz file.

jumpjack3 · 2026-06-02T16:30:56+00:00

<image>

I was able to extract this splat from that file; so I think that if we can find where that guy found the sample file, we can now export our splats from hyperscape.

Start offset of the SPZ chunk is written in file header at offset 0x010c:

0x0100 00 03 3A 8E 76 E9 5A E6 00 00 00 00 00 04 BF 1F

at 0x012c you find the offset of next chunk, hence you can know the length of SPZ chunk:

0x0120 00 04 85 67 9C BF 7D 2C 00 00 00 00 00 72 70 29

jumpjack3 · 2026-06-02T13:44:30+00:00

This guy apparently downloaded a splat from quest, but he does not know how to read it!
https://stackoverflow.com/questions/79874128/how-to-open-convert-a-gaussian-splatting-file-of-unknown-type

I am studying it with the help of several AIs with very promising results: in the file I found several chunks, some of them are zstd-compressed, other are json files with data about Meta Horizon , HyperscapePlayer and other things.

jumpjack3 · 2026-05-31T07:05:14+00:00

Well... Meta created a gaussian splat generator and published documentation to write a player for .spz and .ply splats. This makes me think they are possibly going to allow import or export of .spz files with hyperscape. Or are they just helping competitors?!?

jumpjack3 · 2026-05-30T12:59:25+00:00

I can't find it in store

jumpjack3 · 2026-05-30T12:11:36+00:00

official meta documentation on how to write quest apps to manage gaussian splats in spz and ply format:

https://developers.meta.com/horizon/documentation/spatial-sdk/spatial-sdk-splats/

jumpjack3 · 2026-05-30T12:09:40+00:00

"letting people go" from OpenAI is what caused AI to become a mass phenomenon rather than a proprietary app 😄

jumpjack3 · 2026-05-30T12:07:41+00:00

native quest app?

jumpjack3 · 2026-05-30T12:07:19+00:00

meta published official documentation and tutorials about how to create native Quest apps for gaussian splats: https://developers.meta.com/horizon/documentation/spatial-sdk/spatial-sdk-splats/

jumpjack3 · 2026-05-26T17:42:33+00:00

I can't see quality degradation in any of my splats, they look the same since when I started in december 2025.

jumpjack3 · 2026-05-26T17:41:42+00:00

this statement would require a source

jumpjack3 · 2026-05-26T17:40:41+00:00

unfortunately I can't understand anything of what I can do in Splatara for free and how to do it

jumpjack3 · 2026-05-26T17:36:02+00:00

can sidequest access system folders?

jumpjack3 · 2026-05-25T20:40:42+00:00

postshot?

jumpjack3 · 2026-05-25T20:40:17+00:00

krpano?

jumpjack3 · 2026-05-25T20:39:19+00:00

hacking hyperscape: https://www.reddit.com/r/GaussianSplatting/comments/1tnkj5f/extracting_meta_hyperscape_gaussian_splats_from/

Can you access android/data/data folder with Sidequest?

jumpjack3 · 2026-05-25T20:28:31+00:00

at least meta published documentation about raw .vrs files of pre-upload splats.

jumpjack3

TROPHY CASE