93 lines
4.5 KiB
Markdown
93 lines
4.5 KiB
Markdown
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# Skimmed_CFG
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A powerful anti-burn allowing much higher CFG scales for latent diffusion models (for ComfyUI)
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CFG below at: 6/8/12/16/24/32, skimming scale at 6
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Simply plug after the model loader (same for all the fours nodes):
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Tested with SD3.5 turbo. To make it work set the skimming scale at 2~2.5
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## nodes:
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- Skimmed CFG: My version first version of this, works like a charm!
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- Skimmed CFG - replace: replace the values within the negative by those in the positive prediction, nullifying (actually giving an equivalent scale of 1) the effect of values targeted by the filter.
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- Skimmed CFG - linear interpolation: instead of replacing, does a linear interpolation in between the values. Highly recommanded!
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- Skimmed CFG - linear interpolation dual scales: Two scales. One named "positive" and one.. well "negative". The name is more related to a visualy intuitive relation rather than fully from the predictions. A higher positive will tend to go towards high saturations and vice versa with the other slider.
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- Skimmed CFG - Difference CFG: Other algorithms based on changes depending on the scale. Brings back what goes too far in comparison.
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- Skimmed CFG - Timed flip: To be used with normal scales. Enhances the randomness and overall quality of the image. A bit less of an antiburn and a lot more of an enhancer. SDE Samplers react extremely well to it.
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## special option (first node only):
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- full_skim_negative: fully skim some part of the conflicting influence.
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- disable_flipping_filter: the skimming CFG will have much more control. It is meant to be used with the full_skim_negative toggle on. (the last image of this readme is an example)
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## Side-effects:
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- better prompt adherence
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- sharper images
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- less mess / more randomness due to less conflicts in between the positive and negative predictions
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- something something sometimes fused fingers with too low skimming CFG scale and too low amount of steps.
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## Tips:
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- The skimming scale is basically how much do you like them burned. 3 was the intended scale but suit to your needs.
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- The SDE samplers can still burn a little but much less
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- The SDE samplers can still totaly do nonsense with low steps (not with the node named "Timed flip")
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- A too low skimming scale may require to do more steps
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- Recommanded skim: 2-3 for maximum antiburn, 5-7 for colorful/strong style. 4 is cruise scale.
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- a good negative prompt is a style negative prompt
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- to use super high scales it is not a bad idea to cut the negative before the end. You can find in [this repository](https://github.com/Extraltodeus/pre_cfg_comfy_nodes_for_ComfyUI/tree/main) a node named "Support empty uncond". Plug it after the skimmed cfg node. Then menu>advanced>conditioning>ConditioningSetTimestepRange and set the and at ~65%. This will avoid potential artifacts.
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# Pro tip:
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[It would be actually nice to have some support!](https://www.patreon.com/extraltodeus) because like this I will continue to share my findings!
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Did you know that my first activity is to write creative model merging functions?
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While the code is too much of a mess to be shared, I do expose and share my models. You can find them in this [gallery](https://github.com/Extraltodeus/shared_models_galleries)! 😁
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# Other examples with a CFG at 100
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### Base image 🤭
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### Linear interpolation dual scale 10/0
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### Linear interpolation dual scale 5/0
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### Linear interpolation scale 5
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### Replace
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### Skimmed CFG node skimming scale at 4
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### Skimmed CFG node skimming scale at 4 with razor skim
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### full_skim_negative / disable_flipping_filter / skimming scale at 6 / CFG scale at 32
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_do not lick the screen_
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