FOMM Seg10 Chooser

FOMM_Seg10Chooser is a tiny helper node, and it exists for one reason: to make FOMM_Partswap's chosen_seg_indices input human-readable. Instead of typing a cryptic string like 1_2_5_7 into a text field, you get eleven checkboxes - one per segment - and the node turns whatever you've ticked into the string the Partswap node actually wants.

Each checkbox maps to one of the 10-segment model's semantic regions: m_0_background, m_1_lf_ear, m_2_mouth, m_3_lf_fr_head, m_4_rt_ear, m_5_frnt_face, m_6_lt_cheek, m_7_eyes, m_8_rt_fr_head, m_9_shoulder, m_10_hair_top. Background defaults to off; everything else defaults to on. Tick the parts you want swapped in and the node outputs chosen_seg_indices - an underscore-joined list of the indices of the checked segments.

How it works

There's no model here and no inference. The node counts the booleans you passed in, collects the indices of the ones that are true, and serializes them: "1_2_5" for left ear + mouth + front head. FOMM_Partswap deserializes that string, filters out any index that's out of range for the model you chose (so a bad mismatch won't crash - it just swaps nothing), and builds the blend mask from those segments. This is a pure plumbing node: it converts your checkbox choices into the string the Partswap node's input expects.

Wiring it up

• Output chosen_seg_indices → FOMM_Partswap's chosen_seg_indices input. That's the whole job.
• Match the chooser to the model. Use this one (10 segments) with vox-10segments - and also with vox-cpk, vox-adv-cpk, and vox-first-order, which all run the same 10-segment config. For vox-5segments use the FOMM_Seg5Chooser, and for vox-15segments the FOMM_Seg15Chooser.

You can also type a segment string by hand into chosen_seg_indices and skip this node entirely - it's just a nicer interface, not a required step. But if you're swapping something specific like "only the mouth," ticking m_2_mouth here and seeing it flow through beats guessing at index numbers.

Install and issues

No install beyond the pack itself - ComfyUI Manager (search "FirstOrderMM") or git clone + pip install -r requirements.txt into custom_nodes/, restart. There are no model files for this node; it only matters once you have a Partswap model in checkpoints/.

Two practical gotchas. First, the default "everything but background is on" means if you connect this without thinking, you get a full-face swap - untick the parts you want to keep. Second, segment names are the model's, not yours: that m_7_eyes is plural and includes brows, and m_5_frnt_face is the central face region, so "swap the face but not the eyes" means turning m_5_frnt_face on and m_7_eyes off. Preview via FOMM_Partswap's seg_src_viz/seg_tgt_viz outputs to see what the model actually detected before you commit.