I am trying to run this example: https://sandcastle.cesium.com/?src=3D%20Models.html
In var options I would like to add a glb file in the createMoldel funcion in line 43 where is the link “…/SampleData/models/CesiumAir/Cesium_Air.glb?raw=true”,
1 - How can I make my github works with this example?
2 - How can I make this work with a external link (not the cesium git hub repository) and/or indicating a file in my computer?
Welcome to the Cesium community @Rafael_Luan!
The easiest way to do this is to upload your model to Cesium ion (https://cesium.com/ion/) and that’ll essentially give you a link you can use to load your models into CesiumJS, or any other client.
If you haven’t already seen it, I’d check it out the getting started guide which explains how to set up CesiumJS in an HTML page from scratch (so you could run it locally with files from your computer if you run a local web server): https://cesium.com/docs/tutorials/getting-started/
Hello @omar! Thanks for the direction.
With the approach you suggested, would it be possible to run this SandCastle example with our model uploaded to Cesium ion, just changing the link to our glb file, in the example itself?
Yup! Inside of Cesium ion you’ll see a “Open complete code example” link that’ll give you a template for loading your model and catching any errors etc.
Hi @omar, thanks for the direction.
However, I am afraid I’ll need more guidance if that’s possible, please.
Me and @Rafael_Luan generated a glb file with a 3D model in external software (python), and now we are trying to visualize it in Cesium (this file)
The first approach we tried was to replace the link for the Aircraft (Cesium_Air.glb) in this example with our link. It didn’t work, so @Rafael_Luan started this topic here.
@omar suggested he create a Cesium ion account and upload his model there. Done! And, after several tries, it worked! However:
3DTileset, not a 3DModel. The Aircraft example, the Cesium_air.glb is a 3DModel (I believe, but may be wrong)So, in the end, what we need is:
Questions:
glb file? Or we can set that only in Cesium?We may be missing some important tutorial, so feel free to point us toward the right documents to read! 
Thanks in advance!!
EDIT 1 - it seems possible for the user to change the:
I state this because of this image, but I believe there’s probably a way to lock those.
If it’s a glTF model, the Y axis should be the “up” axis. For OBJ, since there isn’t a standard, Cesium ion will do the most commonly used choice (Z as the up axis for 3D Capture, and Y as up axis for “3D Model”).
Generally, if the size of your model is not that big (10 mb or less) then uploading as a glTF model is fine. Otherwise, you should tile it into 3D Tiles. See this thread on when you should choose 3D Model vs 3D Capture: 3D Model or 3D Capture?.
Cesium ion doesn’t currently support georeferenced glTF models (mainly because there isn’t a standard way to georefernece glTF models). What you could do is use the Cesium ion REST API to upload the model, that’ll allow you to pass in a lon/lat/height for the origin of the model so it’s automatically placed in the right location.
For your question about “locking” the orientation/position of the model - do you mean it should not be possible for you to change the model’s position/orientation inside of Cesium ion? Or that your users shouldn’t be able to change the position of the model?
Are your users accessing the model through a custom CesiumJS app, or through Cesium Stories, or something else?
Hi @omar, thanks for the help! Answering your questions:
For your question about “locking” the orientation/position of the model - do you mean it should not be possible for you to change the model’s position/orientation inside of Cesium ion? Or that your users shouldn’t be able to change the position of the model?
users shouldn’t be able to change the position of the model when looking at it on the Globe.
Are your users accessing the model through a custom CesiumJS app, or through Cesium Stories, or something else?
we will offer our product through Resium.
This is currently how it works. You can only change your model’s position inside of your Cesium ion account as the owner of the asset, which your users won’t have access to.
Hi @omar,
we faced some progress thanks to your advice. 
However, due to some project constraints, it is almost a must-have that we load our 3D models (glb) into Cesium/Resium straight from our servers, bypassing Cesium Ion Assets.
It seems to me that the 3D Models examples in SandCastle does it. Am I right?
But generally speaking, what do I need to make it possible? We could make it with Cesium_air.glb, but not with our model, and their size is very similar.
We noticed that Cesium_air.glb has 3x more attributes than our model. Does it matter?
Thanks!
Can you tell me more about that? Are there any issues you faced using Cesium ion in your project?
Hi @omar, having second thoughts we decided to try both ways: Cesium Ion Assets vs Local Storage.
We first thought that having our models generated in our servers, then uploaded to Cesium Ion to be delivered to our client cloud be a longer way than delivering straightly.
However, we don’t know how Cesium Ion suits our needs, and may be a better solution. So we are assessing both ways to see which one best fits our needs. However, as a currently non-funded startup, we may face some problems with budget, as we are not going to the market yet but testing our product with clients for free probably.
That’s why we want to access it from our servers.
