UV or not UV unwrap when exporting models from Blender to Unreal: when and why

[anonymous_user_7dc3b545]

@darthviper107;729652

By default UE4 has an option to automatically generate lightmap UV’s, so it will take the last channel and it uses the UV seams but does its own flattening and packing (which means if your seams aren’t good then you can’t get a good result from this) So that’s why it added the third channel. If you do your own lightmap UV’s then you want to turn this option off.

So if I understand correctly I can mark and test this seems in Blender, proceed to delete them and the channel, before export and then import in the Unreal to get the channel created automatically with the optimised layout of the UVs. Correctly?