Steampunk world concepts and illustrations.
The design of the walker was adjusted again in the final illustration to show the eccentricities of the crew, in particular the engineer. He attempts to "teach" the walker a new "trick" by programming it to pour a drink. He also previously added ear-like extensions to the walker to make it look more like a dog.

Updated engineer design - https://www.artstation.com/artwork/8eOmGm

Updated walker design - https://www.artstation.com/artwork/XnxPX3