"Back to Greysle" - Ian and Poly (charachters) - https://www.artstation.com/artwork/2ZqkJ
"Busy Afternoons" - Ian and Poly - https://www.artstation.com/artwork/A6oWy
"The fog and the city" - Poly - https://www.artstation.com/artwork/K2Ke9
"Last Salvation" (very old concept) - https://www.artstation.com/artwork/dyN1w
You know what to do if you want.