ExtendIntermediateSigmas - ComfyUI Built-in Node Documentation

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

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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	Data Type	Required	Range	Description
sigmas	SIGMAS	Yes	-	The input sigma sequence to extend with intermediate values
steps	INT	Yes	1-100	Number of intermediate steps to insert between existing sigmas (default: 2)
start_at_sigma	FLOAT	Yes	-1.0 to 20000.0	Upper sigma boundary for extension - only extend sigmas below this value (default: -1.0, which means infinity)
end_at_sigma	FLOAT	Yes	0.0 to 20000.0	Lower sigma boundary for extension - only extend sigmas above this value (default: 12.0)
spacing	COMBO	Yes	”linear" "cosine" "sine”	The interpolation method for spacing the intermediate sigma values

Note: The node only inserts intermediate sigmas between existing sigma pairs where both 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’s treated as infinity, meaning only the end_at_sigma lower boundary applies.

Outputs

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