How I made collectible cards with Open Source Guild authors
using Nano Banana Pro multimodality
I wanted to test Nano Banana Pro not just as an image generator, but as a multimodal system that can combine instructions, reference images, and structured visual data.
What I did:
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I wrote the prompt as a set of instructions for an LLM, not as a classic token-based image description. (The prompt does not contain any text that should appear on the cards.)
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I used images with avatars as well as a separate hint image with all the information that needs to be correlated with these avatars (rarity, nickname, number of followers).
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Inside the prompt, I gave explicit instructions to:
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read all textual information only from that reference image
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bind specific avatars to specific cards
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visually separate Rare, Epic, and Legendary cards by design
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As a result, the model generated a promo-style image of collectible cards, where the layout, text, and hierarchy were derived from multiple input sources instead of being hardcoded into the prompt.
Prompt used:
{[Create a high-end promotional photo of a collectible trading card set titled “Open Source Guild”, aspect ...
If, for some monstrous reason, you don't know the authors on these cards - @Cilia, @Mrs_Hyde, @TheLordofnothingness, run and enjoy their incredible creations!
If you want to try something similar, I’m running a collectible cards challenge — you can make cards on any theme you like.
