About the optimus prime tag
optimus prime is a character tag that NovelAI Diffusion can use. On Danbooru it has 988 posts, and its best-rated still image scores 225. 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 optimus prime
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 optimus prime in a prompt
Put the subject first, then this tag, then quality tags.
optimus prime, solo, best quality, masterpiecewlop, optimus prime, 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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One of the most recognizable Transformers that first appeared in the original Transformers: Generation 1 TV cartoon from 1984. The heroic, wise and powerful Optimus Prime leads the Autobots against Megatron, the evil leader of the Decepticons.
In the first series his alternate mode is a red, silver and blue Kenworth K100 cab over truck. But since his appearance in the the live action movie, he is also frequently depicted as a red and blue Peterbilt 379 semi truck with distinctive flame paintjob.
Before becoming leader of the Autobots, Optimus used to be a smaller robot called Orion Pax. He was mortally damaged by Megatron, but Alpha Trion reconstructed him into the ultimate powerful form of Optimus Prime.
In Japan (except for the Japanese dubs of the live-action films and of Transformers: Animated), Optimus Prime is known as Convoy.
His quote in the G1 series, "”I've got an idea.”":[http://dic.pixiv.net/a/%E7%A7%81%E3%81%AB%E3%81%84%E3%81%84%E8%80%83%E3%81%88%E3%81%8C%E3%81%82%E3%82%8B] is regarded as a type of meme among Japanese Transformers fandom due to its low success rate.
Optimus Prime's original G1 design was created by mecha designers Obara Hiroyuki, Kawamori Shouji (famous for his work in Macross) and Ohno Kouhjin for the Diaclone Japanese transforming robot toy series in the early 1980s.
[quote]Motto: "Freedom is the right of all sentient beings...".[/quote]
See also
FAQ
Does NovelAI recognize optimus prime?
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 optimus prime.
How do I write optimus prime in a prompt?
Write "optimus prime" 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.