Sandy Seafloor (Deep Sea Sweep)

Background illustration I drew for the Sandy Seafloor biome in my game Deep Sea Sweep. I wanted to draw a kind of desert underwater, but I also found basic dunes to be a bit boring (especially in an environment where you can move vertically), so I made some stuff with giant shell pillars and caves. I still went for a very smooth look.
You can find the game here : https://store.steampowered.com/app/2948030/Deep_Sea_Sweep/