No bullet casings on ground

[GabrielPearce]

Mods (complete and add to the following information):
Arma 3 profiling build
Latest stable cba and ace3 (tested experimental as well)

Description:
Using just ace and no bullet casings appear, have enabled/dialed ace casings but cannot get it working
Have tried in stable and experimental ace builds.

Steps to reproduce:
Launch Arma, with ace
Fire gun, no bullet casings on ground
Happened in single player, have not tested multiplayer yet

Expected behavior:
Casings appear next to players when shot, used to work (have used in the past)

Where did the issue occur?
Only tested single player

[LinkIsGrim]

Seems to be caused by the LIS check returning positions below the intersection. We can set a minimum ATL height, but it's not perfect, obviously. Not sure if we can do much regarding buildings though.