Google Sketchup to Unreal

Just to be clear, concerning the texture UV’s, they are perfectly happy overlapping, it’s the ligthmap UV’s that cannot overlap. UE4 will attempt to make the lightmap UV islands non overlapping, but it’s not perfect, especially when the models are essentially unwelded (sketchUP donsn’t have the concept of welding).

I do a fair bit of developing in sketchup for X-Plane (Not UE4), and I use the program below to handle UV’s, it support 2 UV channels, so you can keep the UV’s you created in skechtup, and then unwrap the model in the 2nd channel to use for ligthmaps in unreal. It’s not free, but it works, supports tons for formats, and is very powerful.

http://www.unwrap3d.com/u3d/index.aspx

-Z