SetFirstSigma - ComfyUI Built-in Node Documentation

The SetFirstSigma node modifies a sequence of sigma values by replacing the first sigma value in the sequence with a custom value. It takes an existing sigma sequence and a new sigma value as inputs, then returns a new sigma sequence where only the first element has been changed while keeping all other sigma values unchanged.

Inputs

Parameter	Description	Data Type	Required	Range
`sigmas`	The input sequence of sigma values to be modified	SIGMAS	Yes	-
`sigma`	The new sigma value to set as the first element in the sequence (default: 136.0)	FLOAT	Yes	0.0 to 20000.0

Outputs

Output Name	Description	Data Type
`sigmas`	The modified sigma sequence with the first element replaced by the custom sigma value	SIGMAS

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​Inputs

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Inputs

Outputs