Individual skill
wan-scail-replacement
SCAIL-2 in-video character replacement on WAN 2.1. WanSCAILToVideo + SCAIL2ColoredMask + SAM3, the reference-image framing→scale rule, and the tuning/compositing pitfalls
plugin/skills/wan-scail-replacement/SKILL.md
Source commit 707474d24d0d251ba04a1bebdf86620cef2eaa8b
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- Last checked
- Nov 10, 2026
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- License
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- agent-skills Repository topic
- ai-agent Repository topic
- claude-code Repository topic
- claude-plugin Repository topic
- comfyui Repository topic
- comfyui-extension Repository topic
- flux Repository topic
- image-generation Repository topic
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- engineering Derived category
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# SCAIL-2 In-Video Character Replacement (WAN 2.1)
SCAIL-2 (zai-org, on WAN 2.1 14B) replaces the person in a driving video with a
character you supply as a reference image, end-to-end, with no pose maps, and
with multi-character support. It is the successor to WAN Animate / motion
transfer for the "swap the subject, keep the motion" job. The official ComfyUI
template is `video_wan21_scail2_character_replacement_int8`, built around
`WanSCAILToVideo` (+ `SCAIL2ColoredMask`) with a SAM3 mask driving where the
character goes.
This skill documents the non-obvious behaviours that cost a full multi-minute
render to discover. It is not a from-scratch graph. Start from the official
template and apply the guidance below.
