Two questions about 3D reconstruction from photos

Cesium ion
1

Hey all, just started playing around with this feature and already I’m super impressed. Being able to upload a batch of photos and have it spit out a geolocated 3D model is amazing. However I have two questions I was hoping you could answer:

  1. Is there any way to re-process the data once it’s been uploaded? For example, I uploaded ~400 photos yesterday for a reconstruction and set it to Medium quality, but now I’m curious what high quality would look like. I can’t find any option to re-do the reconstruction, so is my only option to re-upload all the photos again? The photos are ~3GB so I’m worried about how much space this is eating up.

  2. Is there a way to view the Gaussian splats in Unity or Unreal? So far I’ve only tested with Unity, but when I enter the Asset ID for the Gaussian splat version nothing shows up.

Thanks!

2

Hi,

Is there any way to re-process the data once it’s been uploaded?

Currently there isn’t a way to re-run the construction job with different parameters. You are correct in that you will have to re-upload all the photos again. This is valuable feedback for our team that I will convey about your concerns though.

Is there a way to view the Gaussian splats in Unity or Unreal?

Currently it isn’t available to be visualized in our native run times. The current implementation only works with CesiumJS. There are plans to add support for gaussian splat visualization in the team’s roadmap.

Thanks,
Ankit

3

Thanks for the answers!

4

Hey sorry follow-up question: I re-uploaded using the “Extra” quality but I’d say the resulting mesh looks worse, in that there are a number of holes that aren’t in the one processed at regular quality. Is that expected?

5

Hey,

Can you please share the asset id and if possible any screenshots to show what you are seeing in your viewer? I will create an issue for the team to look at.

Thanks,
Ankit

6

Hey yeah it’s Asset 3546020 for the medium quality and 3567527 for the Extra quality.

Here’s a close-up of the Medium Quality:

image
image1150×617 82.9 KB

And Extra Quality:

image
image1158×620 91 KB

7

Hi,

Thanks for providing me the screenshots, I have passed along the feedback to the modeling team to take a look at. I will reach out to you as soon as I have an update.

Thanks,
Ankit