A mechanical {argument name="subject" default="core"} with a hollow, skeletal structure, showcasing intricate internal machinery, gear systems, and precision components. Glowing {argument name="first color" default="orange"} and {argument name="second color" default="sky blue"} light emits from within the core, illuminating the metallic framework. Set against a smooth gray background, highly detailed, cinematic lighting, high realism, octane render, symmetrical composition.