How you prompt depends on the engine you're using.
Forge — natural language
Forge understands plain English. Describe the scene like you'd tell a person:
A woman in a leather jacket leaning against a neon-lit wall at night, cinematic, light rainFull sentences, moods, and details all work.
Prism & Anime — Booru tags
Prism and Anime are driven by Booru tags: short, comma-separated keywords the models were trained on. Skip full sentences.
Simple:
1girl, red dress, beach, sunset, smiling, looking at viewerMore complex, with weighting:
1girl, (red dress:1.2), windswept hair, beach, sunset, (freckles:0.8), looking at viewer, depth of field- Default weight is 1.0;
(tag:1.2)emphasizes a tag,(tag:0.8)plays it down. - Don't push much past 1.7, or you'll get artifacts.
- You can find tag references online (for example, danbooru's tag list).
You usually don't start from scratch
For every Peep image, AI Peeps already builds a full, correctly-formatted prompt behind the scenes — from the Peep and the chat — so most of the time you just tweak. Want a blank slate instead? Switch on Full Control Mode in custom generation and only your own prompt is used. See Images.