Extra Schedulers extension for Stable Diffusion webUI

built for new Forge, partial support for Automatic1111, and probably reForge

(webUI must have split sampler/scheduler selection)

Important

not for old Forge. For some related stuff in old Forge, see my old OverrideScheduler extension.

What do?

Adds six new schedulers to the dropdown list:

• cosine: follows a, you guessed it, cosine curve. Initial drop is relatively slow.
• cosine-exponential blend: starts cosine, ends up exponential (long tail).
• phi: (based on original by Extraltodeus)
• Laplace: (credit Tiankai et al. (2024), via Comfy)
• Karras Dynamic: (via yoinked-h)
• custom: either a list of sigmas [1.0, 0.6, 0.25, 0.1, 0.0] or an expression that will be evaluated for each sampling step. A list will be log-linear interpolated to the number of sampling steps. A list starting with 1.0 and ending with 0.0 will be scaled between sigma_max and sigma_min. Otherwise list will be interpreted as is.
  • m: minimum sigma (adjustable in Settings, usually ~0.03)
  • M: maximum sigma (adjustable in Settings, usually ~14.6)
  • n: total steps
  • s: this step
  • x: step / (total steps - 1)
  • phi: (1 + sqrt(5)) / 2

Adds six new samplers:

• Euler a CFG++ [Forge only]
• Euler CFG++ [Forge only]
• Euler Dy CFG++ (based on Euler Dy by Koishi-Star) [Forge only]
• Euler SMEA Dy CFG++ (...) [Forge only]
• Refined Exponential Solver (credit: Katherine Crowson, Birch-san, Clybius)
• DPM++ 4M SDE (credit: Clybius)

Why do?

Different results, sometimes better. I tend to use cosine-exponential blend most of the time.

How do?

(schedulers) It's just a calculation of different number sequences travelling from sigma_max to sigma_min over the set number of sampling steps, guiding the denoising process. Infinite possibilities, but few sweet spots.

Redo?

Yes, custom scheduler is saved to image infotext and params.txt.

How install?

Go to the Extensions tab, then Install from URL, use the URL for this repository.

Then, go back to the Installed tab and hit Apply and restart UI.

more?

Check the 'neg' branch instead.