A huge futuristic grey submarine with two wings and three engines, Unreal Engine 
A huge futuristic grey submarine with two wings and three engines, Unreal Engine --v 4
A huge futuristic grey submarine with two wings and three engines
Unreal Engine
a steampunk submarine floating in a body of water
a 3d rendering of a futuristic submarine
this is a 3d rendering
a 3d rendering of a futuristic submarine