[Unsolved] Allow building on the corner of a cliff

[CaptainMigraine]

Hi everyone. I've been working on a Tower Defense map called Directional TD for Starcraft 2. I noticed in another map called Elemental TD, you can place your towers on the corners of cliffs.

Can somebody tell me how this was done so that I can make that possible in my map too? If it involves using the data editor, I already have 2 custom towers.

Thanks!
-Neil (CaptainMigraine)

 

[Dr Super Good]

I think they stuck walkable platforms (actor or unit) on the corners. I recall something like that as the solution from SC2Mapster.