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How to layout UV with mirrored/symmetrical features?

How should UV be laid out if the mesh is symmetrical or has symmetrical Features?

This mesh Looks the same from all four sides and the UVs for each side are overlapping.

Regarding the lightmap, should I unwrap the whole mesh or do overlapping UVs not matter?

Hi Raildex,

This page in documentation should help with your lightmap layout questions: https://docs.unrealengine.com/latest/INT/Engine/Content/Types/StaticMeshes/LightmapUnwrapping/

In short though, Overlapping UVs is OK for your texture material, but when it comes to lightmaps you don’t want to have any overlapping faces or faces that are outside of the 0,1 space, otherwise you’ll get a warning about these overlapping faces and the lighting will not look correct for the bake.

Thank you really much :slight_smile: