I can't seem to find the field you are refering to on the footprint?
It's a flag that you can set in the footprint editor in the Placement Apply layer. It applies to every square of the build grid where the footprint is painted with that set (in the example below it's pale blue).
Also, how would I place the doodads afterwards? Can I do it on the invisible platform I'm using?
I don't know what invisible platform you're talking about. All you should need is the doodad with the properly configured footprint and cliff boost level on the actor.
It's a flag that you can set in the footprint editor in the Placement Apply layer. It applies to every square of the build grid where the footprint is painted with that set (in the example below it's pale blue).
I don't know what invisible platform you're talking about. All you should need is the doodad with the properly configured footprint and cliff boost level on the actor.
On the doodad actor, set the (Basic) Actor: Boosted Cliff Level to 1.
Then on the doodad's footprint, enable the Boost Cliff flag on the Placement Apply layer where you want the cliff level to be raised.
That's basically how you make bridges and custom cliffs/walls.
Check out the for a cool example of how this can be used.