About the signum tag
signum is a character tag that NovelAI Diffusion can use. On Danbooru it has 1,724 posts, and its best-rated still image scores 222. The samples above put the tag at the front of a fixed base prompt with seed 1234, so the differences between tags come from the tag alone.
How each model draws signum
Follows composition and expression instructions closely, so the effect shows in a tidy form.
Reacts to the tag more strongly, so its effect is easier to see.
WAI illustrious SDXL v17, a local model. Shows how the same tag reads outside NovelAI.
Writing signum in a prompt
Put the subject first, then this tag, then quality tags.
signum, solo, best quality, masterpiecewlop, signum, soloThe negative prompt and the full settings are on the terms page.
How these samples were made
Every image uses 832×1216, seed 1234, 23 steps and the k_euler_ancestral sampler. The base prompt and negative prompt stay the same for every tag, and only the tag under test changes. Images flagged by the NSFW check are regenerated with a new seed or hidden.
From the Danbooru wiki
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A character in Mahou Shoujo Lyrical Nanoha A's.
She appears in neither the previous series Mahou Shoujo Lyrical Nanoha nor the alternate universe story Triangle Heart, but appears in Mahou Shoujo Lyrical Nanoha StrikerS. Signum is the leader of the Wolkenritter (German for "Cloud Knights"), a creation of the Book of Darkness.
Signum's weapon is a chain-link whip sword called Laevatein, and as a magical creation, she has no familiar. She is named for the Opel Signum, much like characters of Magical Girl Lyrical Nanoha are named for cars, and her device appears to be named after the mythical sword Laevateinn. As per the other Wolkenritter, she has no last name.
She is voiced by Shimizu Kaori (Japanese) and Bailey Chadwick (English).
See also
FAQ
Does NovelAI recognize signum?
Compare the samples on this page. Every tag on this site shares the same seed and base prompt, so any change you see comes from signum.
How do I write signum in a prompt?
Write "signum" near the front of the prompt and separate it from other tags with commas.
Should I use V5 or V4.5?
V4.5 shows the tag's effect more strongly. V5 gives steadier images with fewer artifacts.