Dynamically updating Gaussian splat causes flickers

[panangam]

Hello. I'm trying to create a 3D Gaussian splatting scene where I dynamically modify the Gaussian positions, covariance, etc. I managed to modify the buffer directly, but it flickers with something that looks like a plain sphere every frame:

Screencast_20251128_183307.webm

(The video shows a simple example updating the X coordinate every 0.1 second.)

Is there a more correct way to dynamically modify the Gaussians without having the flickers?

The code to update the Gaussians below:

gs_handle = server.scene.add_gaussian_splats(...)

while True:
    new_buffer = gs_handle.buffer.copy().view(np.float32)
    new_buffer[:, 0] += 0.01
    gs_handle.buffer = new_buffer.view(np.uint32)
    time.sleep(0.1)

[brentyi]

Hi @panangam! I made a PR with a fix. Would you be able to check if it fixes your problem?

[panangam]

@brentyi Yep, that did it, thank you! That was so fast. Should I close this issue now, or wait until the PR is merged?
#616

[brentyi]

Thanks for confirming!! I've been caught up with some travel but can close the issue after I make a second pass on the PR and merge it 🙂