ModelSamplingSD3 - ComfyUI Built-in Node Documentation - ComfyUI

The ModelSamplingSD3 node applies Stable Diffusion 3 sampling parameters to a model. It modifies the model’s sampling behavior by adjusting the shift parameter, which controls the sampling distribution characteristics. The node creates a modified copy of the input model with the specified sampling configuration applied.

Inputs

Parameter	Description	Data Type	Required	Range
`model`	The input model to apply SD3 sampling parameters to	MODEL	Yes	-
`shift`	Controls the sampling shift parameter (default: 3.0)	FLOAT	Yes	0.0 - 100.0 (step: 0.01)

Note: The node applies the shift value with a fixed internal multiplier of 1000. If the original model has a noise scale setting, it is preserved in the modified model.

Outputs

Output Name	Description	Data Type
`model`	The modified model with SD3 sampling parameters applied	MODEL

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