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The FLUX.1 [dev] Model is licensed by Black Forest Labs. Inc. under the FLUX.1 [dev] Non-Commercial License. Copyright Black Forest Labs. Inc.
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YFG Mline – Sepia Mechanical Illustration Plates
Base Model
Flux.2 Klein 9B
Style
A richly illustrated sepia-toned mechanical / retro-futurist plate style with strong portraiture, ornate machinery, gears, pipes, etched backgrounds, and old-print illustration energy. The look feels like a blend of vintage engraved portrait plates, steampunk concept art, retro sci-fi illustration, and antique technical fantasy artwork.
Trigger
Use YFG-Mline to help bring out the intended style more consistently.
Prompting
This LoRA responds best to short prompts.
Simple subject-first prompts tend to work especially well, for example:
“astronaut portrait”
“woman in hood”
“steam train”
“mechanical centipede”
“golden armored warrior”
Let the LoRA do the stylistic heavy lifting.
Strength
All sample images were generated at:
LoRA weight: 1.0
Guidance: 1.5
Sampler:
er_sde
Since the sample set was built around 1.0, that is the best starting point. From there:
Lower for more prompt fidelity
Raise for stronger Mline identity
Adjust to taste depending on how much of the antique-mechanical look you want.
Key Characteristics
Sepia / Bronze Palette – Warm antique tones dominate most generations.
Mechanical Ornamentation – Gears, pipes, metal frameworks, engine parts, and etched technical motifs appear often.
Illustrated Portrait Bias – Especially strong on faces, busts, and centered character portraits.
Retro-Futurist Subject Matter – Handles astronauts, trains, armored figures, insects, sci-fi machinery, and religious / symbolic imagery very well.
Plate / Poster Feel – Images often feel like antique illustrated cards, engraved covers, or old-world sci-fi prints.
Prompt Ideas
“astronaut”
“woman portrait”
“steam locomotive”
“mechanical mushroom”
“hooded figure”
“city of the future”
“armored knight”
“spaceship hangar”
“cyborg head”
“mechanical insect”
You can also use slightly longer prompts if needed but keeping them compact seems to help preserve the core style.
Tips & Tricks
Keep prompts short
This is probably the biggest tip for this model. It seems to thrive on concise subject descriptions.
Use the trigger word
Adding
YFG-Mlinecan help reinforce the intended visual identity, especially when prompts are very simple.
Good for portraits and machines
Faces, armored characters, trains, ships, insects, religious iconography, and industrial scenes all seem to work very well.
Lean into the antique vibe
Words like “sepia,” “engraving,” “mechanical,” “ornate,” “retro-futurist,” “bronze,” and “illustrated plate” may help when needed.
Expect embellishment
Even simple prompts may gain gears, decorative linework, industrial backgrounds, or mechanical flourishes.
Recommended baseline settings
If you want results similar to the sample set, start with:
Weight: 1.0
Guidance: 1.5
Sampler:
er_sde
YFG Mline is a highly stylized sepia mechanical illustration LoRA that excels at turning simple prompts into ornate, antique-looking sci-fi / fantasy artwork. It appears especially strong for portraits, machines, symbolic imagery, and retro-futurist scenes. For best results, keep prompts short, start at weight 1.0 / guidance 1.5 / er_sde, and let the model’s visual identity take over.

