Concept Art
A lot of Concept Art has been created and continues to be created by the developers for the game Subnautica. Concept Art is made for future features of the games, although the designs are subject to change during the course of development. There is Concept Art for Biomes, Vehicles, and Life Forms.
Not everything that is shown in the Concept Art actually makes it into the game. Examples might be the whale creature or the different types of submarines.
Biomes
Floater Island concept art
Floater Island concept art
Grand Reef concept art
Grassy Plateaus concept art
Inactive Lava Zone concept art
Inactive Lava Zone concept art
Kelp Forest concept art
Koosh Zone concept art
Koosh Zone at Night, concept art
Inactive Lava Zone "Black Castle" concept art
Inactive Lava Zone concept art
Inactive Lava Zone "Magma Forest" concept art
Mushroom Forest concept art
Safe Shallows concept art
Twisty Bridges concept art
Technology
Life Forms
Grabcrab [1] concept art