Not able to adjust UV maps of the IFC file imported with Datasmith

Development Pipeline & Plugins
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1

Hi there,

I’m working in a small office that is using Revit LT and not able to install the datasmith plugin on my machine.

The only way that I found to import my geometry and maintain the materials categories (like in a window, have two different material for glass and frame) is saving IFC file from Revit and use datasmith add-on in UE4.

The issue is when I try to adjust the UV map size or scale, it’s showing correctly when I select the toll in the modeling mode, but when I apply the setting it’s not register the change.

It’s not an issue when I use FBX file but I lose the distinction of the material differences in one object like a window with this format.

Please see the screenshots and any help would be great.

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2

Hello Massarc
are you on 4.27.2? Does it still behave not as expected once you untick “UV scale Relative to World Space”?

The UE5 UI seems to propose a lot more options. Have you tried it?

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3

Hi @UE_FlavienP

Thanks for your response.

The UV scale to world is disabled when I try to change the scale.

Since I have a non-RTX card, I’m using Luoshuang’s GPULightmass which doesn’t work for me in UE5

Update. Same issue exists in UE5

4

Try the following:

  1. Right-click the mesh in the outliner → Edit
  2. In the Details panel, navigate to LOD 0 → Build Settings
  3. Uncheck Generate Lightmap UVs
  4. Save and go back to the main editor

Now UV scaling and translation should work just fine.