4D Gaussian Splat

POPs
1

Hi there, really excited to get my hands on POPs!
Starting to mess around with loading PLY’s,
Curious if there are any plans to support the time domain/animation of 4D splats?

I imagine I could always record a point cloud as a image sequence and pack/unpack it as workaround, or somehow parse out the 4D PLY into multiple ply files.

Thanks!

2

Hello @CConchinha
I don’t think we are planning at the moment on supporting 4D splats loading and rendering.

1 Like
3

This is where a lot of the discussion has taken place:

Side note: we will make the Point File In POP a little easier to manage all the (60+) channels / attributes of the .ply files.

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4

GaussianSplatting-1.0.30_POPs.toe (33.7 KB)

here’s a WIP update to Tim Gerritsen’s setup above leveraging POPs.

We’re still working on improving loading a lot of channels with the Point File In POP.
The main speed gain is from the Sort POP which uses a radix algorithm and is much faster than the bitonic sort with TOPs.

The path to get the .ply file is in the .toe file.

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The sample toe above currently runs extremely slow/freezes in 5.3 (2023.32127), we’re looking into it, please use 5.2 to try it for now.

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Here is an updated and simplified version that works with the February 11, 2025 Alpha 5.3:

GaussianSplatting-1.0.37_POPs.toe (37.2 KB)

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Updated for Alpha 6 with GLSL syntax changes
GaussianSplatting-1.0.39_POPs.toe (37.2 KB)

5 Likes