Vines grow on Barrier Blocks, that all there really is to it. When there is a barrier roof and you place a vine on the highest block of a wall the vine goes out into the air connected to a barrier block...
Comments 8
Its a bug, Barrier blocks are meant to be an Invisible block that you cant go through. If fences connecting to barrier blocks is a bug, then this is a bug too.
That's kinda cool, actually.