Our crew found a bug that allows full invisibility (minus weapons).
To replicate this simply place a lieutenant command podium get someone to stand in it and then simply destroy the podium, they will remain invisible until they use a bed to fast travel or die. This possibly might work for anything the player can "mount" that is destroyable.
Attached is a short gif of how easy this bug is to replicate.
fe8ce410147f586b27ed878a7e613750.mp4