Fast Masking Node for ComfyUI in Development, With SAM3 Selection and BiRefNet Refinement

ComfyUI node developer ausboss - e/acc (@Zanzibased) posted on October 11, 2026 that a fast masking node for ComfyUI is in development. Users select an object by clicking it, typing its name, or scribbling over it; SAM3 generates the mask, and BiRefNet refines fine details such as hair and fur. A manual brush plus live grow/soften controls are built directly into the node.

On the author's description, the confirmed scope is selection, refinement, and manual correction handled inside one node: SAM3 selection, BiRefNet refinement, and brush plus grow/soften manual correction included in the node.

Click, Name, and Scribble Selection With SAM3, Plus BiRefNet Refinement

The author-described workflow has two stages: selection and refinement.

• Three selection inputs: click an object directly, type its name, or mark it with a rough scribble.
• SAM3 selection engine: all three inputs feed SAM3 for mask generation.
• Fine-detail refinement with BiRefNet: complex-boundary regions such as hair and fur are refined with BiRefNet, as explicitly stated.
• Built-in manual correction: a manual brush and live grow/soften controls live inside the node, so automatic masks can be fixed in place.

The root post includes a vertical 1080x1350 demo video.

Repository Locations and Current Status

The same author's follow-up post shared two links.

• GitHub: ComfyUI-AusBoss
• ComfyUI Registry: ausboss-nodes

The node is work in progress at this point. No formal release or version information was provided, and install steps, dependencies, and usage docs were not included in the post bundle, so check the repository pages directly. The word "fast" is the author's own description without numeric evidence, so it should not be read as a measured performance claim.

Sources

• ausboss - e/acc (@Zanzibased) X post: Fast masking node for ComfyUI in development
• GitHub: ausboss/ComfyUI-AusBoss
• ComfyUI Registry: ausboss-nodes