These are some modular walkways and platforms suitable for star wars legion. I've done a bit of an overview video if you want to check that out:
Barriers with barricade and half barricade style
Platform with gap in middle for ladder
Octagonal Platform - More angles!
Wider Stair Option
Special L Shaped Support
Unique Supports for more designs - View video below
Fixed - Support bases had holes that were too big
Added - New Stairs that have holes and pegs, I suggest to glue one side, and then the other. Experimental, untested.
Ocatagonal Platform With Square Hole in Middle
Tinkercad Public File:
shouldn't require supports, not sure about infill
Might need some filler/spackle in the supports, as my printed had big gaps. Other than that, maybe some sanding.