I have no idea how but i added a 3 UV channel in Max, after deleting the 3 channel… Here is the new test… by the way the standrad wraped cylinder looks excatly the same.
It’s very curious to me why your mesh looks that strange, My setup is, UV’s like you see “lightmaps”, 128 x 128 Pixels resolution, 2 Smoothing groups and all hard edges are split, lighting quality is set to production.
Ouh and the first test above with the 3 channels is not valid, becasue of the 3 channels and the pipes were set to movable.
Lightmap 128 x 128 pixels
Here is the uasset file, test it cause i’m really curious why you are getting this strange result. Warning it’s a free upload service, so there is spam.
http://www.megafileupload.com/687s/PP.uasset
After 20 to 30 different builds with different positions of the pipes , i’m getting some kind of issues but nothing strange like you have. Lightmaps are set to 128, Build quality is production.
So it works good for me, not always perfect but good.