Hyper-Realistic 3D Simulation Prompt: Crescent Moon Vessel

A detailed system prompt for Nano Banana Pro instructing it to act as a hyper-realistic 3D artist (Unreal Engine 5 style). The prompt defines a structure for generating an image of a transparent object filled with content, simulating physics like refraction. This specific command generates a complexly decorated crescent-shaped glass vessel filled with a swirling nebula, small glowing planets, and sparkling stardust against a deep velvet black background.