Create a cinematic, symmetrical, and anatomically correct digital illustration of a Chronomaly Technology robot on a Curse of Fiend, Zaku, with a gradient maroon bullpup design, set in a post- apocalyptic science fantasy world with steampunk elements. The robot should be posed in front of pink walls, with a mix of green and metallic colors in its armor. The artwork should be created in a style similar to those trending on ArtStation and DeviantArt, using Unreal Engine 5 and Octane Render