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SDXL-Lightning: four-step generation on any SDXL checkpoint

Q: Over-saturated, crunchy images

CFG above 2. Set CFG to 1 and keep Euler with sgm_uniform.

Sujet : Modèles

Par Captain

Publié le 2026-09-30

ByteDance's SDXL-Lightning LoRA turns a 30-step SDXL render into a 4-step one. Learn the step counts, the CFG you must use, the sampler, and how to combine it with your favorite checkpoints and style LoRAs.

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Aperçu

SDXL-Lightning is a progressive adversarial distillation of

SDXL

released by ByteDance. The

LoRA

versions are applied on top of any SDXL

checkpoint

and let it produce a finished image in 2, 4 or 8 steps. The catalog entry is the LoRA, which is the flexible way to use it because it keeps your checkpoint's style.

Because the distillation already decides how the image converges, classic guidance scales break it:

Lightning

wants a

CFG

near 1 and a plain Euler sampler with the sgm_uniform scheduler.

Référence

Nom	Type	Rôle
LoRA weight	1.0	Use full strength; lowering it reintroduces noise.
Steps	4 or 8	Match the LoRA variant. 4 steps is the sweet spot of speed and quality.
CFG	1-2	1 for the 4-step LoRA; up to 2 for the 8-step variant.
Sampler	Euler	Euler with sgm_uniform. Ancestral or Karras schedulers give blotchy results.
Resolution	1024	Standard SDXL buckets; Lightning does not change the native size.

Aucune installation requise – exécutez les modèles IA dans le cloud

BitVector Prism est la façon la plus simple de commencer : choisissez un modèle, tapez un prompt et générez dans une application web épurée, sans rien configurer. BitVector est aussi disponible sur Discord et sur le web (SpyGlass).

Essayer BitVector

Pas à pas

Load an SDXL checkpoint you like (realistic, anime or painterly) and attach the Lightning LoRA at 1.0.
Set steps to 4, CFG to 1, sampler Euler, scheduler sgm_uniform.
Prompt as you normally would for that checkpoint;
negative prompts
have little effect at CFG 1, so lean on the positive.
Generate a batch; Lightning is fast enough to explore eight seeds at a time.
For a final image, switch to the 8-step variant at CFG 1.5 for a little more detail.

Exemples

Fast portrait with a realistic checkpoint

photo of a fisherman mending nets at a harbor, morning fog, warm side light, 35mm, natural skin texture

Steps 4, CFG 1, Euler, sgm_uniform, Lightning LoRA 1.0

Anime checkpoint plus style LoRA

1girl, reading on a train, window light, autumn fields outside, soft colors, detailed background

Lightning LoRA 1.0 plus a style LoRA at 0.7, 8 steps, CFG 1.5

Creative idea: rapid storyboard

storyboard frame, wide shot, a courier cyclist weaving through monsoon traffic, neon reflections on wet asphalt, cinematic anamorphic look

Generate 12 variations and pick the sequence

Astuces

Lightning is the fastest way to audition style LoRAs: stack one at 0.7 and iterate in seconds.
Hands and small faces suffer most at 4 steps; use 8 steps or an inpaint pass for those.
Hires fix still works: 1.5x at 0.4 denoise with the same 4-step settings.
If colors look burnt, your CFG is too high; it is the single most common mistake.

Dépannage

Over-saturated, crunchy images

Pourquoi cela arrive

CFG above 2.

Comment le corriger

Set CFG to 1 and keep Euler with sgm_uniform.

Noisy or unfinished output

Pourquoi cela arrive

Step count lower than the LoRA variant, or LoRA weight below 1.

Comment le corriger

Match steps to the variant (4 or 8) and set the weight to 1.0.

Aucune installation requise – exécutez les modèles IA dans le cloud

PirateDiffusion est réservé à Telegram et conçu pour les pros : des milliers de modèles, LoRA et workflows pilotés par commandes de chat, avec génération illimitée à prix fixe.