Environment 1:
While the creatures were being designed, the environment was also being thought about- here is initial sketch of the Cove environment

Environment v1 and v3:
After the details of the designed were finalized, several color ideas were provided. Here are two examples. The gray stone will be realized.

Here is a closeup of the hut

Nest
The "Hector" flies into a nest off shore away from the Shale. Here is a concept image for the nest.

Sky
This sky was painted as a concept for the environment. The sky was later cloned for use in the sky texture.