The number of UV maps you can use is limited.

• 8 for In Blender.
• 8 for Static Mesh in Unreal Engine.
• 4 for Skeletal Mesh in Unreal Engine.

Since v0.4 update it now possible to export Geometry Node attribute as Uv!

You can correct extreme UV for better quality in Unreal Engine. This is useful if you use UVProject Modifier in Blender.

With correct button in Tools > UV Map

With auto correct at export (Makes export slower))

Result

• UE Docs: Understanding Lightmapping in Unreal Engine
• BFU Docs: Light Maps
• BFU Docs: Generate UV Light Maps
• For community support and discussions, join the discord BleuRaven Side Projects.

Download:

• AssetsExample_LightMap.blend
• AssetsExample_UVForLightMapGenerate.blend