Design a Gundam fused with Optimus Prime, towering above a small person on a Chronomaly Pyramid Eye Tablet, inspired by the symmetrical styles of Werner Andermatt and the gentle hues of Muqi. The fusion should be perfectly symmetrical, with a color scheme primarily consisting of red, yellow, and blue. The environment should resemble an details image, with the Gundam-Optimus Prime fusion as the main focus. The image should be rendered using Octane Render and Unreal Engine, showcasing a level of detail and realism that would make it trending on ArtStation.