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Bad light map results. Weird artefacts.

I’m lightmapping my scene and the result on my mesh. Specifically on the ‘rounded’ corners are quite ugly and janky looking. I’ve supplied pics of my mesh in blender, the lightmap result in unreal, and the non lightmapped object in unreal.

I’ve tried various things in blender. I had two UV channels. One for the texture, the second for light mapping. I unwrapped this normally and with smart UV unwrap. Also tried deleting the UV map entirely. Nothing seems to give me nice results when lightmapping.

Imgur

Imgur

Imgur

Hi!

Can you show us your lightmap (uv)?
Where you place any seams there is a high possibility that there will be some artifacts so try to keep them on minimum! Try to keep them only on hard edges!
…maybe on this mesh I would cut it into half horizontally and flatten it out + if necessary snap to grid/pixels…