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Sigmas Nodes

ClownsharkBatwing edited this page Jan 14, 2025 · 11 revisions

SigmasSchedulePreview

Use this node to analyze the trends for the sigmas with various noise settings. The model input is required.

sigma = the noise level at each step.

sigma_next = the target noise level at the end of each step.

sigma_down = how far down the sampler really goes, when noise addition is being used.

sigma_up = how much noise is added after each step.

σ + sigma_up = the maximum noise level at each step.

Δt̂ = the full step size: how much noise is removed at each step after noise is added (sigma + sigma_up - sigma_down). Ultimately, the effect on the overall sampling process matches delta_t below.

Δt = the step size: how much noise is removed at each step (sigma - sigma_next).

alpha_ratio = how much the current latent is scaled by (as a multiplier) at each step prior to noise addition.

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