I see 2 issue on first glance
1.you creeating empty mesh component, so noting will apper on screen, or else you hidden something
2.there possibility that same wall be created twice.
You didn’t execly said what wrong happening with you current set so i don’t know what to say more ;p
Also 2nd screenshot shows your lack of knowledge about blueprint flow control nodes. not only all those “Branch” nodes can be replaced with single “Switch” node… the entire circuit can be replaced with single “Select” node which translates one value to another (which is what your circuit doing), you don’t even need to make a function to make it look compact with just using “Select” node.