🎈List-Mask-Splitter

The mask twin of ImageListSplitter, and it does exactly what you'd guess: takes a MASK input and a comma-separated index string, and returns the masks you asked for as a list. Segmentation or inpainting runs often produce more masks than you want - a detector fires on five faces and you only care about two - and this is the least-friction way to thin the herd before it reaches your inpaint node.

It ships in Comfyui-LG_GroupExecutor, LAOGOU-666's small utility pack. Same deal as the image version: dependency-free, no models, and handy if you already have the pack installed for the group-execution features.

How it works

Identical logic to the image splitter, minus a channel dimension. indices splits on commas and parses ints. Input can be:

• A single batched mask tensor [B, H, W] - indices pick from the batch.
• A list of masks - indices pick from the list.

Outputs are [1, H, W] tensors in the order you listed them. Out-of-range indices are logged and skipped; nothing valid in the request means an empty MASK list comes back.

Inputs & outputs

• masks (MASK) - batch or list in.
• indices (STRING) - e.g. 0,2,4.

Output: masks (MASK list).

Install

cd ComfyUI/custom_nodes
git clone https://github.com/LAOGOU-666/Comfyui-LG_GroupExecutor

or ComfyUI Manager → "Comfyui-LG_GroupExecutor", then restart.

Small print

• Same ordering rules as the image version: 3,0,1 reorders, 2,2,2 duplicates.
• A 2D [H, W] mask inside a list gets unsqueezed to [1, H, W]; anything with an unexpected shape is skipped with a warning.
• Index parse errors (letters or malformed separators) log and return an empty list - check your string if a mask suddenly vanishes downstream.