In unreal there is made many big buildings with boxes, floors etc. I want to duplicate these, but when i select one buildings and it pieces it duplicates only about 80 percent about building and some floors and roofs, windows etc is missing
I guess you simply missed to select some pieces…
nope all are selected
This may not be exceedingly useful in your situation, but I’ve found that making buildings in a blueprint veiwport makes it so that if you want to copy them all you have to do is drag out a new instance.