nano-banana-pro Portrait Style Reference: Realistic and Artistic Dual Demo

Centered on nano-banana-pro's text-to-image capabilities, this is a set of portrait style prompt reference demos. The work uses an already generated portrait as a reference image, then feeds it in via image_input, letting the model translate the same person into an artistically processed version while preserving the character's features and scene, directly showing the difference between the two prompt orientations of "realism" and "artistic". Structurally it has two layers: the reference material establishes the subject (lighting, shot size, character temperament), while the prompt in the author's input describes the target style and translation direction; resolution is set to 2K to preserve skin texture and hair-strand detail, and aspect_ratio is fixed at 4:5 to suit portraits and social media layouts. On the factual side of the model, nano-banana-pro (whose technical name in the materials is Gemini 3 Pro Image) is positioned as quality-first, supporting text-to-image and image-to-image editing, multi-image character consistency and composition control, with native 2K output and intelligent upscaling to 4K — these traits map exactly onto this work's demand for "the same person staying consistent across styles". Applicable scenarios: providing developers with directly reusable input examples (reference image + style prompt + resolution/aspect parameters); also suitable for portrait style exploration, previewing serialized visual content, and comparative prompt testing.