About the pixiv red tag
pixiv red is a character tag that NovelAI Diffusion can use. On Danbooru it has 250 posts, and its best-rated still image scores 56. 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 pixiv red
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 pixiv red in a prompt
Put the subject first, then this tag, then quality tags.
pixiv red, solo, best quality, masterpiecewlop, pixiv red, 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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Pixiv Red, or Fandom Red, is a depiction of Red that became very popular on Japanese art sharing websites like Pixiv during the late 2000s to early 2010s. He is a version of the Red that appears on Mt. Silver in Pokemon HeartGold and SoulSilver.
Departing from the game's design, this fandom version had short, loose black hair and red eyes (sometimes black, brown, or grey). He was slim, if not toned, with a stoic face and a cool persona. His feelings were usually kept very subtle.
When depicted with a Pokemon, he usually favored Charizard as his main, or was drawn with Pikachu as his companion.
Take note: not every Red depicted as stoic, with black hair, and/or with red eyes is a Pixiv Red. The hair on a typical depiction of Pixiv Red is more relaxed and glossy and does not fan out to the sides, a la post #2278447. His eyes aren't very wide either, compared to his official counterpart.
FAQ
Does NovelAI recognize pixiv red?
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 pixiv red.
How do I write pixiv red in a prompt?
Write "pixiv red" 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.