FreeU_Advanced

FreeU Advanced Plus (And Post-CFG SHIFT)

Let's say you and I grab dinner, and movie after lunch? 🌃📺😏

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Exmaple of default node settings applied across blocks.

default_block_examples default_block_examples_2 default_block_examples_3 default_block_examples_4 default_block_examples_5 default_block_examples_6 default_block_examples_7

Input Parameters

• model (MODEL): Model to patch
• target_block (COMBO): Which block to target; input_block, middle_block, and output_block
• multiscale_mode (COMBO): A list of available multiscale modes:
  • ["Default", "Bandpass", "Low-Pass", "High-Pass", "Pass-Through", "Gaussian-Blur", "Edge-Enhancement", "Sharpen", "Multi-Bandpass", "Multi-Low-Pass", "Multi-High-Pass", "Multi-Pass-Through", "Multi-Gaussian-Blur", "Multi-Edge-Enhancement", "Multi-Sharpen"]
• multiscale_strength (FLOAT, Default: 1.0, Range: [0.0, 1.0], Step: 0.001): Strength of scaling
• b1_slice (INT, Default: 640, Range: [64, 1280], Step: 1): The size of the array slice for b1 operation
• b2_slice (INT, Default: 640, Range: [64, 640], Step: 1): The size of the array slice for b2 operation
• b1 (FLOAT, Default: 1.1, Range: [0.0, 10.0], Step: 0.001): b1 output multiplier
• b2 (FLOAT, Default: 1.2, Range: [0.0, 10.0], Step: 0.001): b2 output multiplier
• s1 (FLOAT, Default: 0.9, Range: [0.0, 10.0], Step: 0.001): s1 Fourier transform scale strength
• s2 (FLOAT, Default: 0.2, Range: [0.0, 10.0], Step: 0.001): s2 Fourier transform scale strength

Optional Parameters

• b1_mode (COMBO): Blending modes for b1 multiplied result.
  • ['bislerp', 'colorize', 'cosine interp', 'cuberp', 'hslerp', 'inject', 'lerp', 'linear dodge', 'slerp']
• b1_blend (FLOAT, Default: 1.0, Range: [0.0, 100], Step: 0.001): Blending strength for b1.
• b2_mode (COMBO): Blending modes for b2 multiplied result.
  • ['bislerp', 'colorize', 'cosine interp', 'cuberp', 'hslerp', 'inject', 'lerp', 'linear dodge', 'slerp']
• b2_blend (FLOAT, Default: 1.0, Range: [0.0, 100], Step: 0.001): Blending strength for b2.
• threshold (INT, Default: 1.0, Range: [1, 10], Step: 1): The exposed threshold value of the Fourier transform function.
• use_override_scales (COMBO): "true", or "false" on whether to use override_scales
• override_scales (STRING, Default: [Multiline String]): Override scales. Create custom scales and experiment with results.
  • Example 10, 1.5 would create the multiscale_mode effect Sharpen
  • You can use #, // and ! to comment out lines.

FreeU BibTex

@article{Si2023FreeU,
 author    = {Chenyang Si, Ziqi Huang, Yuming Jiang, Ziwei Liu},
 title     = {FreeU: Free Lunch in Diffusion U-Net},
 journal   = {arXiv},
 year      = {2023},
}

:newspaper_roll: License

Distributed under the MIT License. See LICENSE for more information.

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Post-CFG SHIFT (Flux)

Post-CFG Stepwise Hybrid Inject + Fourier Tuning.

• Runs after classifier-free guidance (CFG) merges cond/uncond each sampler step.
• Modifies the sampler’s current denoised tensor (in VAE latent space in typical pipelines), not model weights.
• Appli