In a future update, walls will probably be added making this post obsolete however until then you can use this guide!
Setting up your walls:
First you are going to make a closed area using terrain then you will need to get a barrier device, once you get the barrier device you must turn player collision OFF. After you have done that go to the layers tab:
and put the barrier into the “behind layer”
Wall color:
This part must NOT be skipped over, otherwise your walls will look out of place.
Every terrain part in DLD creative has a very distinct color to it. In response to this you must set your wall color to be similar to the terrain you are using.
This is an amazing idea! Great guide, it’s very simple, clear, and organized! Also this is something that I needed BADLY and I’m sure I’m not the only one!