Glossary
Seed
Short answer
The number setting a generation's starting randomness; the same seed with the same prompt reproduces the same image.
Diffusion models start from pure noise, and that noise is derived from a number. That number is the seed.
Fixing the seed makes generation reproducible. Note the seed of an image you like and you can regenerate it with the same prompt and settings.
Its real use is producing variations: hold the seed fixed and change one word in the prompt, and you see that word's effect in isolation. This is the fastest way to learn prompting.
Example
Run "red jacket" and "blue jacket" with the same seed and you get two images differing only in the jacket's colour.
See also
You will meet this in
- Stable Diffusion — Unlimited Generation on Your Own MachineOpen source; installed locally it is free, uncensored and completely controllable.
- Midjourney — The Aesthetic Quality LeaderThe subscription generator that delivers the most consistent artistic and aesthetic results.
- Leonardo AI — Generation on Free Credits That Renew DailyFree credits that renew daily, a large model library and dedicated tooling for game assets.