I have a problem when I use the mesh extrusion extruding a tube.I want to export the tube for a FBX or object in unity.Someone give me any advice.Thanks!
Unity doesn’t support any kind of exporting assets. It’s a game engine, not a modelling tool. There are some custom scripts / plugins which allow you to export to some formats. you might find some of them on the UnifyCommunity wiki.
Here’s is an amazing .OBJ exporter, so simple works perfectly: