ExtendIntermediateSigmas - ComfyUI Built-in Node Documentation - ComfyUI

The ExtendIntermediateSigmas node takes an existing sequence of sigma values and inserts additional intermediate sigma values between them. It allows you to specify how many extra steps to add, the spacing method for interpolation, and optional start and end sigma boundaries to control where the extension occurs within the sigma sequence.

Inputs

Parameter	Description	Data Type	Required	Range
`sigmas`	The input sigma sequence to extend with intermediate values	SIGMAS	Yes	-
`steps`	Controls the number of intermediate sigma values inserted between each pair of existing sigmas. The interval between two sigmas is divided into `steps` parts, producing `steps - 1` new values per pair (default: 2, which inserts one value per pair)	INT	Yes	1 to 100
`start_at_sigma`	Upper sigma boundary for extension - only extend sigmas below this value (default: -1.0, which means infinity)	FLOAT	Yes	-1.0 to 20000.0
`end_at_sigma`	Lower sigma boundary for extension - only extend sigmas above this value (default: 12.0)	FLOAT	Yes	0.0 to 20000.0
`spacing`	The interpolation method for spacing the intermediate sigma values (default: “linear”)	COMBO	Yes	`"linear"` `"cosine"` `"sine"`

Note: The node only inserts intermediate sigmas between existing sigma pairs where the current sigma is less than or equal to start_at_sigma and greater than or equal to end_at_sigma. When start_at_sigma is set to -1.0, it is treated as infinity, meaning only the end_at_sigma lower boundary applies.

Outputs

Output Name	Description	Data Type
`sigmas`	The extended sigma sequence with additional intermediate values inserted	SIGMAS

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