Bad UV with importation

Development World Creation
,
1

Hello, I tried to export an asset from blender to ue5, but this asset did not have the same uv as in blender and I did not find any solutions, so I would like to know if anyone has already encountered this problem and could help me, thanks.

Blender
Blender1920Ă—995 132 KB

UE5
UE51920Ă—1048 124 KB

2

Which UV channel index are you using inside of blender? You should be using channel 0 to mark uv’s for your mesh.

uv (0 index)

image
image1916Ă—966 170 KB

in Unreal

image
image780Ă—938 47.9 KB

uv (1 index)

image
image1915Ă—1002 177 KB

in Unreal

image
image887Ă—982 57.9 KB

The UV’s export correctly.

Are you doing any additional transforms in your materials via nodes inside of blender?

3

In Blender and ue5 my UVs are in channel 0, but maybe ue5 only takes the first case of the UV panel, which could create weird things like this?

UE51
UE511920Ă—1048 122 KB

Blender1
Blender11920Ă—1017 106 KB

4

Ok so you are using UDIMs.

You need to enable virtual textures in your project settings.
A bit of an older video but it does show the process in ue4 (not much should have changed in this regards in the engine)

External link on youtube:

Here is the documentation. Do a quick search for udim to find the part regarding your problem

5

Thank you, it works, I will be able to continue my project.