I am not sure I undestand your question, but I've noticed I made a mistake, it's not a 0,1,0 wall but 1,0,0 wall. It doesn't change much though. Screenshot is from vanilla, and this is how it should be drawn. 1,0,0, and 0,0,1 both must be drawn above falling scenery from 0,0,1 to 0,0,0. It's falling behind those walls.
Assuming falling scenery is drawn in 0,0,1, draw order is:
1,0,0 / 0,1,0