Unreal Engine 5 Freezes when saving packages or saving anything

[yi32]

After digging, I believe the problem is coming from the Texture Streaming.

1. It silent crashes if you try building the texture.
   Building Texture Streaming Data in Unreal Engine | Unreal Engine 5.3 Documentation

2. The Material Texture Scales viewmode show incomplete textures

3. The console command BuildMaterialTextureStreamingData silent crash

It might be link to that

UE5 Crash on building streaming texture

I think the issue tends to stem from duplicating textures in a way Unreal doesn’t handle well, so multiple textures end up with the same GUID. I’m not too sure why it would be giving you an error of duplicate texture GUIDs when all your textures are still reporting unique GUIDs. My first idea would be that my program updated a GUID it couldn’t, so it thought there’s no conflict even though there is. In that case, I would expect the GUID to revert on an editor restart, so I don’t see that as t…

but I have not tested to port it in 5.3