Why my GLTF doesn't respect the render depth order

[benzsuankularb]

Hi, I’ve created a little demo to load my problematic GLB file.
using GLTF loader.

And got the artifact like the image below.

I doubt how is this possible and is there any way to get around it?

I know the render order (depth position) of each object may not be sorted properly.

But I thought it shouldn’t be the case since each object render call are sharing the same depth buffer. Or I’m misunderstanding something?

[donmccurdy]

The most common cause of this issue is when your materials use alpha blending (material.transparent = true) without actually being transparent. If you’re creating this model in Blender, you’ll want to set “Alpha Blend: Opaque” in the material settings.

[benzsuankularb]

Yes, That’s exactly the case.
Thanks so much.