I’m loading it in my app as a webview
phone version: iPhone SE
os version: 15.4
Something is wrong with the animation, or something is wrong with the material！！！
And it’s 100% wrong
Normal is like this：
I know it can’t be solved, but I’m sending it out to let everyone know！！！
Hi @superTigery welcome to the forum!
Can you please repro and share with a Playground? It makes our life much more easier.
emmm，sorry, I can’t use the Internet on my work computer, but the model is this, you can take it
I rendered it in bjs and then played the animation at the right time，nothing more
15.4 is quite old: you can’t update to a newer version?
I tested on my iPhone SE iOS 17.3.1 and it does work correctly.
Maybe you can try to force WebGL1?
Direct URL for testers:
https://sandbox.babylonjs.com/?assetUrl=https://popov72.github.io/BabylonDev/resources/3d/my-opt2meshopt.glb
Yes, the new OS works perfectly!
Our testers found the problem and raised it
I use console to view the log, and there are no warnings or errors！！
If I can’t solve it, I will choose to upgrade, but what about my customers?
Just leave them alone. Ha, ha, ha！！！
Getting a 404 when trying to run this.
Interested to try as we regularly test with a 1st generation iPhone SE, which supports iOS 15.8 but no later, and we’ve had no issues with it in our own stack.
It’s a problem of url encoding. I updated my post so that the link is not automatically encoded by the forum / the browser.
Works, thanks 
And works/looks as expected on our 1st gen iPhone SE at iOS 15.8!