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.
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