PatchModelAddDownscale - ComfyUI Built-in Node Documentation

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

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The PatchModelAddDownscale node implements Kohya Deep Shrink functionality by applying downscaling and upscaling operations to specific blocks in a model. It reduces the resolution of intermediate features during processing and then restores them to their original size, which can improve performance while maintaining quality. The node allows precise control over when and how these scaling operations occur during the model’s execution.

Inputs

Parameter	Data Type	Required	Range	Description
model	MODEL	Yes	-	The model to apply the downscale patch to
block_number	INT	No	1-32	The specific block number where downscaling will be applied (default: 3)
downscale_factor	FLOAT	No	0.1-9.0	The factor by which to downscale the features (default: 2.0)
start_percent	FLOAT	No	0.0-1.0	The starting point in the denoising process where downscaling begins (default: 0.0)
end_percent	FLOAT	No	0.0-1.0	The ending point in the denoising process where downscaling stops (default: 0.35)
downscale_after_skip	BOOLEAN	No	-	Whether to apply downscaling after skip connections (default: True)
downscale_method	COMBO	No	”bicubic" "nearest-exact" "bilinear" "area" "bislerp”	The interpolation method used for downscaling operations
upscale_method	COMBO	No	”bicubic" "nearest-exact" "bilinear" "area" "bislerp”	The interpolation method used for upscaling operations

Outputs

Output Name	Data Type	Description
model	MODEL	The modified model with downscale patch applied