Separate meshes combined at reimport [4.5 preview]

I have imported multiple static meshes from single file, with “Combine Meshes” flag checked off. When I try to re-import single mesh, I am getting all meshes from that file combined and imported instead.

Hi ,

I’ve just tested this and I am not able to reproduce this.

Here is my workflow:

  • Created Mesh with three boxes in 3Ds Max and exported FBX with all three assets.
  • Import into UE4 with Combine Meshes flag off
  • Three meshes import
  • Save all
  • Select a single mesh from the three that were imported
  • Right-Click Re-import

Using this I had no issue at all.

Can you clarify if this is your workflow as well?

Thank you!

Tim

Yes, this is my workflow, however I am experiencing random import behavior since I switched to 4.5 - sometimes meshes re-imported separately, and sometimes they are merged. I am attaching the mesh.

Thanks for providing the asset. I was able to reproduce this with your asset, but not with a newly created one. I tested several methods of trying to reproduce this with something new and did get it do so.

With that said, even though I was not able to reproduce it I put in a bug report (TTP: 349070) with the hopes that this can be figured out.

The only work around for this that’s not very convenient would be to use separate FBXs for each one.

Thanks for your report!

Tim

I’m having this exact issue with 4.6! It is very annoying. I have to start texturing from scratch when I need to do any update.

Sorry for digging up an old topic, but i’m experiencing the same issue in 4.8.3.
Exporting object by object will be totally overkill to me as my models are Lego Bricks library, so i’ll be 80 years old until i finish exporting all the bricks ^^

I’ve got the same issue in 4.10 and this is a complete show-stopper for me. Any change to my meshes and I can delete all meshes, reassign all textures, rename all meshes, place all meshes (i.e. very nearly build my map from scratch).

It’s even worse with animation clips. The first import correctly imports 20 individual animations, but any change to the FBX file means the UE4 editor will import the first clip in the file 20 times, destroying my whole animation setup.

Combine this with the general slowness of the editor and blocking progress windows and the tiniest tweak to a texture coordinate becomes 4-6 hours of work :-/

I got the same problem,
I have an architectural design in sketchup,
here is the workflow;

I have the default auto importing settings in UE

  • In sketchup export several objects at once (whole floor of an apartment building) in OBJ format.
  • open it in blender version 2.77 and uv map.
  • export it as FBX
  • import to UE 4.10 for the first time, bind textures etc.
  • reopen skecthup and revise the model
  • export OBJ
  • Import to Blender and UV map
  • export FBX
  • copy FBX inside contents folder of UE project
  • auto import is triggered and every single mesh object is replaced with the combined whole floor model. Causing 900 floor models on top of each other.

it is not acceptable to export each element seperately and try to position one by one in UE4.

This older ticket entered with TTP:349070 was transferred over to JIRA with UE-1434.

This ticket was closed out as won’t fix.

I would suggest using the Auto-Reimport option. You can read more about it here in a the documentation: Reimporting Assets Automatically in Unreal Engine | Unreal Engine 5.1 Documentation

Thank you!

Tim