# AI Image Generators

Each generator leaves its own residue. These pages show what a given model writes into a file, and a full before/after on a real render.

- [Removing the generation signature from Stable Diffusion output](https://passreal.com/generators/stable-diffusion): Stable Diffusion writes its generation parameters into the PNG and leaves a periodic upsampling residue. Here is what both look like, and what a pass changes.
- [Nano Banana watermark: what it is and what PassReal removes](https://passreal.com/generators/nano-banana): Nano Banana images carry two marks: a C2PA manifest in the file and SynthID in the pixels. One is removable, the other is not. Here is which is which.
- [Gemini AI watermark: what it is and what PassReal removes](https://passreal.com/generators/gemini): Gemini images carry a C2PA manifest in the file and SynthID in the pixels. The first comes off completely, the second does not. Here is how to tell them apart.
- [Meta AI watermark and the AI Info label: what triggers what](https://passreal.com/generators/meta-ai): Meta AI images carry an invisible mark plus IPTC provenance fields, and that metadata is what triggers the AI Info label on Instagram and Facebook.
- [Veo watermark: the visible mark, SynthID, and what PassReal covers](https://passreal.com/generators/veo): Veo output carries a visible corner mark on video plus SynthID in the frames. PassReal processes still images, not video - here is what that means for you.