At dawn, they set out to find their culprit, who might be anywhere in this vast city. Its stinking sprawl spanned the planet below, and hung from several massive rings overhead.

Their ship rose into the morning light, their exhaust no filthier than the trashed urban landscape that this world had become.

And on another world, two systems away, another search party found themselves greeted by huge Tripod robots whose jobs were to keep the environment clean at any cost. These images are the creation of UK artist Andree Wallin, who manages to capture the decadent beauty of future citiscapes - as well as future countryside, entirely tended by robots.

At last both groups of searchers converged on this hideaway. They didn't bargain on it being a sentient AI who could fold itself up into a ship and shoot offworld at any time.

See more of Andree Wallin's work via Concept Ships