comfyui-mask-batch-union

A ComfyUI custom node that collapses a batch of masks down to a single mask.

Node: Mask Batch Union

Category: mask

Accepts a batch of masks (shape [B, H, W]) and merges them into one mask using either:

• max — pixel-wise maximum across the batch (default). Good for overlapping regions where any mask should activate.
• sum_clamp — sum all masks then clamp to [0, 1]. Useful when you want additive intensity up to full white.

Inputs

Name	Type	Description
masks	MASK	Batch of masks to merge
mode	max | sum_clamp	Merge strategy

Output

Type	Description
MASK	Single merged mask