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About the gloom (expression) tag
gloom (expression) is a face tag that NovelAI Diffusion can use. On Danbooru it has 5,200 posts, and its best-rated still image scores 855. 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 gloom (expression)
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 gloom (expression) in a prompt
Put the subject first, then this tag, then quality tags.
1girl, solo, gloom (expression), best quality, masterpiecewlop, 1girl, gloom (expression)The 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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When a character is visibly depressed because they are disappointed, often the result of this is from a situation that ended quite comical, at least from reader's point of view.
Besides the facial expression, other indications of comical gloom include dark straight lines, a dark aura, or hitodama around the character.
If the character is depressed due to overwhelming sadness or genuine distress, use despair or traumatized instead.
Examples
See also
FAQ
Does NovelAI recognize gloom (expression)?
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 gloom (expression).
How do I write gloom (expression) in a prompt?
Write "gloom (expression)" 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.