Devious Paintings mark secret loot caches in Once Human. It is a two-part treasure hunt: finding the initial paintings and then tracking down the actual rewards. In most cases, the loot crates are within the same region of the painting, while at other points you may need to travel a good distance. Since this is a seasonal mission, youll want to collect all the goods as soon as possible before the Devious Paintings become inaccessible.