Prompt: damaged scavenger robot wandering through fallen ruins, corroded metal plates reveal circuitry within, moves with limping gait, dull rust colored armor patterned after leprosy lesions, Craig Mullins concept art style, inspired by Wojciech Siudmak's retrofuturism, Adam Brockbank's intricate machinery, Doug Chiang's alien mechanical design, Simon Stålenhag's painterly robot vignettes, crumbling arcology in the distance under ominous sky by evening light, 16K masterpiece artwork.