Here is a small selection of cover walls that I worked on for the Division 2 game and the expansion. I worked as a jr prop artist on the buildings team at Massive Ubisoft. We had several cover walls that contained a lot of different pieces in several different heights and a lot of work went into making it optimized and smart.
The buildings team design, model and texture modular building pieces and additional building related props, set it all up in Snowdrop and later helps out with optimizing in the levels. The building team made all the cover wall kits.