JoinImageWithAlpha - ComfyUI Built-in Node Documentation

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

This node is designed for compositing operations, specifically to join an image with its corresponding alpha mask to produce a single output image. It effectively combines visual content with transparency information, enabling the creation of images where certain areas are transparent or semi-transparent.

Inputs

Parameter	Data Type	Description
image	IMAGE	The main visual content to be combined with an alpha mask. It represents the image without transparency information.
alpha	MASK	The alpha mask that defines the transparency of the corresponding image. It is used to determine which parts of the image should be transparent or semi-transparent.

Outputs

Parameter	Data Type	Description
image	IMAGE	The output is a single image that combines the input image with the alpha mask, incorporating transparency information into the visual content.