Tiling process blocked at 9%

Cesium ion
1

Hello,

I tried tiling 3 different files on Cesium Ion coming from the same Blender file in different formats, but they all block at 9% in the tiling process.
Files aren’t even huge, they’re all under 1 GB.

Here are the IDs of the assets :
-3446302
-3446306
-3446340

I tested this tiling process on .glb files and .obj file. It comes from an elevation model file (DEM) that’s handled with BlenderGIS

Can someone help me out please ?

Thanks

2

Hi,

I apologize that you are running into issues with your data being tiled. Unfortunately, you are running into a limitation in our old 3D Model tiler. You can try to re-run the above assets with the BIM/CAD option which uses a newer pipeline and should be more robust for tiling the data.

Thanks,
Ankit

3

Thank you for your answer. Unfortunately I get just one tile, that is a glb file (the same I had). There’s no point in tiling if at the end I get only one glb file, which I already had before even starting this process.

I did as you said and used the BIM/CAD option, and here’s the ID : 3450511

I just don’t get why it gives me only one tile without tiling into subtiles, with multiple LODs ? It’s a large piece of land, with up to 4 millions Vertices (that I converted from a .tif file to a glb file with BlenderGIS). Any hints ?

4

I read 27719, and it was suggested to check the data with the 3d Tiles inspector sandcastle using the asset id and adding in the associated access token

That’s what I did, and I zoomed in.

image
image1678×894 111 KB

Confirmed, I only have one LOD, from my GLB file that has like I said, 4 millions vertices. I don’t understand

Can you help me out ?

I can provide the glb file if needed.

Thanks

5

Hi,

There isn’t currently a way to force LOD generation on a model. Do you get a single LOD output for the obj upload as well?

One question based on the information you provided: if this is terrain from a tif file, Cesium ion accepts tif terrain file uploads that it converts to quantized mesh. Is there a reason you are looking to upload a glb? What is the final output you are looking for?

Thanks,
Ankit

6

Hello,

Yes I get a single LOD output for the obj upload aswell. Which I don’t understand, like I said

Yes there’s also a reason I’m looking to upload a glb : I am making a Three js scene, where I want the user to interact and view the terrain, through tiles. Quantized mesh is a way, but it doesn’t fit my needs since the data ends on a globe at the end.

I’m using this : GitHub - NASA-AMMOS/3DTilesRendererJS: Renderer for 3D Tiles in Javascript using three.js

Again, with quantized mesh you can’t do as much as you can with other 3D Tiles.
I have no idea how I’m supposed to generate different LODs for an optimized solution on the browser. Currently I have one big mesh that is not tiled.

Do you by any chance, have similar cases of people that tried to generate 3D Tiles of a 3D model, and they didn’t understand why they ended up with only one tile ?