Stylistically, these concept art images by Craig Mullins showcase a dark and mysterious atmosphere with a fantasy world setting. The use of dark blue and black color scheme creates a cinematic lighting effect, enhancing the hyper realistic details of the old steam train in various stages of its journey. The foggy forest, glowing trees, and smoke surrounding the train add to the otherworldly landscape, while the presence of monsters with glowing eyes near the locomotive intensifies the eerie feel. Images also depict fire on the tracks, steam engine on wheels, and fire explosions in a grimdark environment, all presented in a concept art style perfect for immersive storytelling or video game visuals.