UE5.3 Fixing screen after saving or import 3d model

Development Asset Creation
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1

My game is fixing on the screen, no black screen or others. UE5 just keep working in the back ( 0% Cpu, 3Go Ram, 0% GPU )

2

Hello Romight, Welcome to the Forums.

There might be a bit of a mis-translation for “fixing on the screen”.

I’ll assume that UE is ‘locking up’ or ‘becoming unresponsive’ when importing or saving a mesh.

Personally, I’ve seen some long pauses when importing large/high poly meshes. (With similar lack of system resource usage)

How many MB is the 3d model?
How many Triangles does the 3d model have?

If it’s over 100MB, or over 1 million triangles, I’d try testing with a smaller mesh. For the big mesh, you might just need to wait a long time.

3

hi, yeah mis-translation, it’s like UE freezes and no longer responds, but not only when importing 3d, but also when Saving
My 3d model is 96.3MB and contains animation, it have 54k triangles

4

Thanks for the extra info.

That is a slightly hefty file, but not unreasonably so.

If you walk away for say… 1 hour while it is frozen, is it frozen when you come back?

What CPU do you have? Do you know if you’re running a mechanical hard-drive (Large, spinning magnetic discs) or SSD?

Have you tried importing any other meshes?

5

I never tried to come back after an hour, but when it crashes, my CPU and GPU go to 0% usage so it would be weird if it came back suddenly.
My specs: Ryzen 7 7840HS, 32GB Ram DDR5 5600Mhz, RTX 4070, Lexar NM790 4TO SSD
Yes I imported 3d models with Quixel without any problem, but as soon as I have a 3d model that I want to import of more than 10/15 MB, it “crashes”, expect for Quixel

6

Ok, I don’t think your computer speed has anything to do with it.

There is a difference between crashing and freezing forever. (If you crash, it will exit and a crash-log will pop up)

If freezing, you might be able to see some info in the output log about what’s happening right before the freeze. (Window → Output Log)

What file type is the 3d model?

I’d try importing it to Blender and then exporting it as a different filetype. (.fbx , .obj , .gltf )

7

Yeah, it freezes, sorry for the translation error
I’ve tried to import my 3D Model with the Outpout Log, on my 2nd screen, nothing special appear
It’s just a character from Mixamo, just downloaded it to test UE5 quickly ):
I’ve tried to import in FBX after exporting Blender doesn’t work every time
OBJ seems to work fine

8

Thanks for the extra info.

I did a google search for “unreal engine mixamo import freeze” and it looks like you’re not the only one experiencing this.

This solution might work.

9

Thank you so much
But sadly doesn’t fix my freeze when I save ):

10

Hm, I wonder if it is possible to separate the skeleton and the animations from a Mixamo fbx…

I’ve never used Mixamo, so someone else or Mixamo support might have to help.

You could also try downloading the 5.4preview version and trying there. (You’ll be able to update it to the full release of 5.4 once that is released)