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Model import with strange UV set

OK, so this is a special case. I modeled this one with 3dsMax 2014, create 2nd UVs channel, as you can see in this file. However, when I export them with .fbx (2014) format, the model only has one UVs set, and that UVs set comes from nowhere, it doesn't match with any of model's UVs set.

I got this problem not only with UE 4.12, but also with every UE version, since UE 4.8.

Is this a bug? I don't think I did something wrong. Everything else in the scene is fine. This is the only one cause me trouble.

Download the model here.

Product Version: UE 4.12
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asked Oct 15 '16 at 01:02 PM in Bug Reports

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Hi golemsmk,

You actually have 4 UV channels applied to the staircase. Unreal seems to be only reading the last two. I noticed that this usually happens if you import a model from another program (Like SketchUp) that has already been UV mapped. The only way I know that consistently fixes this issue is the following steps:

  • Create a basic cube

  • Quick Align it to the mesh (shift+a)

  • Select the cube and attach the problem mesh

  • Delete the cube in element selection mode so that the stairs remain

  • Rename the stairs to the desired naming convention

  • This will allow the model to import with all 4 UV channels if you don't want 3 and 4 you will have to delete them with the UVMapping Clear modifier.

Let me know if that helps,


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answered Oct 17 '16 at 03:08 PM

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