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Object has Overlapping UV's and Lightmap UV are overlapping by 1.3%

Once I build the level I am creating a few of my objects cause the following errors to appear: "Object has Overlapping UV's" and "Lightmap UV are overlapping by 1.3% (This value varies from object to object) Please adjust content - Enable Error Coloring to visualize." I'm using the Infinity Blades: Grass Lands pack for the objects and currently I am having this error with SM_Plains_Vine01, SM_Exo_WoodPlanks02, SM_Plains_Flowers02 and SM_Plains_Flowers04.

I'm still fairly new to UE4 so if you could provide and screenshots of what I need to change in order to correct these errors then that would be greatly appreciated! Thank you in advance :)

Product Version: UE 4.9
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asked Nov 18 '15 at 01:41 PM in Rendering

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Xenoharry
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avatar image Logan Bailey ♦♦ STAFF Nov 18 '15 at 03:50 PM

Hello Xenoharry,

I was able to reproduce the errors that you see after building lighting. I ran a few tests and discovered this message only appears if you are using any of the assets you mentioned as a foliage type. If you use these as Static Mesh's, even when the mesh is overlapping, the error does not appear.

These are the steps I used to create this test.

  1. Added the Grasslands pack to a new blank 4.9 project.

  2. Added the mentioned mesh's to the foliage brush.

  3. Painted some foliage on a landscape.

  4. Built the level.

Please let me know if any of these steps differ from yours. I believe this could be a bug either with the assets themselves, the reporter, or 4.9.

Logan

avatar image Galadhlinn Dec 26 '15 at 02:33 PM

Hello, I am experiencing the same error with the sames assets SM_Plains_Flower04

Also I get: InstancedFoilageActor_0 Instanced meshes don't yet support unique static lighting for each LOD, lighting on LOD 1+ may be incorrect. Performance Warning No importance volume found and the scene is so large that the automatically synthesized volume will not yield good results. Please add a tightly bounding lightmass importance volume to optimize your scene's quality and lighting build times. Is there any update on this?

Thanks, -G

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The importance volume is called because you do not have a lightmass importance volume within your scene. Please add on and have it encompass all of your assets.

  1. Would you add these assets to a 4.10 project? Does you still see this warning?

  2. Does deleting the SM_Plains_Flower04 from your scene get rid of this message?

  3. I found a bug entered earlier this year and it has been marked as fixed as of 4.9. I am wondering if this error only occurs with this specific asset. If so it is an asset issue.

After you test these three things please respond with your results.

-Logan

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answered Dec 29 '15 at 04:02 PM

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