💜 Compositor Masks Output V4

Compositor4MasksOutput is the V4 twin of CompositorMasksOutputV3: it takes a COMPOSITOR_OUTPUT_MASKS bundle and unpacks it into image_1–image_8 plus mask_1–mask_8, each matching the layer's position, scale and rotation on the canvas. Same code shape, same purpose - pull every layer back out as individual tensors so you can feed them into per-layer controlnets, inpainting or edit models.

But here's the thing you'll hit immediately: the V4 Compositor node currently doesn't emit a layer_outputs socket at all. In the 4.0.x source that output is commented out - the README says mask output and advanced outputs were "temporarily removed" during the V4 alpha rewrite. So this node's only input (layer_outputs, a COMPOSITOR_OUTPUT_MASKS object) has nothing to plug into if you're using pure V4 nodes. It exists for when the output comes back, and for anyone who wires a V3-style producer into a V4-style unpacker.

If you need per-layer outputs today, the honest recommendation is to use the V3 line: Compositor V3 → layer_outputs → CompositorMasksOutputV3. V4's alpha status is the reason, not a preference.

Installing

Standard pack install, no models, no extra deps:

cd ComfyUI/custom_nodes
git clone https://github.com/erosDiffusion/ComfyUI-enricos-nodes.git

or ComfyUI Manager → search "Compositor" → erosDiffusion. Restart.

What to know

• The 16 outputs are all always present - empty slots come back as a blank image and a fully transparent mask, so downstream graphs don't break on missing layers.
• There's a hidden subtract_masks toggle in the code for stacking (higher layers' masks subtracted from lower ones), but the author hasn't shipped it as a full feature - don't build a workflow around it.
• Mask convention is ComfyUI-standard; if things look inverted, the fix lives in the Config node's invertMask, not here.

Short version: bookmark this node for when V4's layer output returns; run V3 if you need masks out of the compositor this week.