KarrasScheduler - ComfyUI Built-in Node Documentation

Complete documentation for the KarrasScheduler node in ComfyUI. Learn its inputs, outputs, parameters and usage.

The KarrasScheduler node is designed to generate a sequence of noise levels (sigmas) based on the Karras et al. (2022) noise schedule. This scheduler is useful for controlling the diffusion process in generative models, allowing for fine-tuned adjustments to the noise levels applied at each step of the generation process.

Inputs

Parameter	Description	Data Type
steps	Specifies the number of steps in the noise schedule, affecting the granularity of the generated sigmas sequence.	INT
sigma_max	The maximum sigma value in the noise schedule, setting the upper bound of noise levels.	FLOAT
sigma_min	The minimum sigma value in the noise schedule, setting the lower bound of noise levels.	FLOAT
rho	A parameter that controls the shape of the noise schedule curve, influencing how noise levels progress from sigma_min to sigma_max.	FLOAT

Outputs

Parameter	Description	Data Type
sigmas	The generated sequence of noise levels (sigmas) following the Karras et al. (2022) noise schedule.	SIGMAS

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