Best practices for prompting nano banana

• August 30, 2025 at 22:53 IST
• ai
• gemini
• google

I came across this post on X while scrolling that lists a bunch of best practices for prompting for Gemini 2.5 Flash Image (Nano Banana) model to get the best results. I am also copying the entire post content below, in case the tweet gets deleted and I lose these tips:

• Be hyper-specific: The more detail you provide, the more control you have. Instead of "fantasy armor," describe it "ornate elven plate armor, etched with silver leaf patterns, with a high collar and pauldrons shaped like falcon wings."
• Fix character consistency drifts: If you notice a character's features begin to drift after many iterative edits, you can restart a new conversation with a detailed description to retain consistency.
• Provide context and intent: Explain the purpose of the image. For example, "Create a logo for a high-end, minimalist skincare brand" will yield better results than just "Create a logo."
• Iterate and refine: Don't expect a perfect image on the first try. Use the conversational nature of the model to make small changes. Follow up with prompts like, "That's great, but can you make the lighting a bit warmer?" or "Keep everything the same, but change the character's expression to be more serious."
• Use "semantic negative prompts": Instead of saying "no cars," describe the desired scene positively, "an empty, deserted street with no signs of traffic."
• Aspect ratios: When editing, Gemini 2.5 Flash Image generally preserves the input image's aspect ratio. If you upload multiple images with different aspect ratios, the model will adopt the aspect ratio of the last image provided.
• Control the camera: Use photographic and cinematic language to control the composition. Terms like wide-angle shot, macro shot, low-angle perspective, 85mm portrait lens, and Dutch angle give you precise control over the final image.

Really helpful tips, especially about the aspect ratio.

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