PatchModelAddDownscale - ComfyUI Built-in Node Documentation

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

Outputs

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

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