you make a perimeter and fill it in on the normal editor, than paste that code over and scale it up in the dream machine editor, or copy it around to fill in the space.
Wellebelly use this link to take you to the super mario maker contest. in the second post it gives a tutorial on everything you need to know on how to use the Super Mario maker editor which is the exact same thing as the dream machine editor
legend, much appreciated i'll send you a screenshot to give you an idea of the composition so far. i'm using the dream machine to line everything up so individual codes is all good
that looks good i would just remove that line connecting the beams on the top. maybe add some damage to the beams
somewhere in this track should be collapsed buildings https://www.freeriderhd.com/t/680828-decay it might help