Here are some environment assets that I created for project Sentinel's vertical slice demo. We needed to show the environment being taken over by an enemy alien faction that we were representing with oceanic and shellfish-like features, so I created a set of mushrooms that grew like coral that could be placed around the environment. I also authored a crate asset following the same theme following concept art provided by one of the team's artists.
Assets were sculpted in zbrush, broken down in 3dcoat, and then textured in painter and imported into Unreal. Myself and the designers on the team all participated in set dressing and the coral were scattered in natural spaces to fill out the environment.
Concept art for the abyssal crate was provided by Matt Griffith.
https://www.artstation.com/griffithart
Prototype demo video