SCAIL: Identity-Stable Animation & Motion Transfer using Playground and API | RunComfy

Model Overview

• Provider: Tsinghua University / Z.ai
• Task: video-to-video
• Max Resolution/Duration: Up to 896x512 or 512x896; up to 120s
• Summary: SCAIL is a specialized motion transfer model that generates studio-grade, identity-consistent character animation by transferring motion from a driving video to a single reference image. Leveraging Spatially-Constrained Adversarial Learning, it excels at preserving structural integrity during complex deformations (like spins or dances), making it particularly robust for both realistic and stylized (anime/illustration) characters where other models often suffer from identity drift.

Key Capabilities

Identity‑preserving motion transfer from a single image

• SCAIL transfers motion from any driving video to a reference image while maintaining strong structural fidelity and character identity across frames.
• Outputs remain stable under cross‑identity motion and challenging scenarios like turns, flips, and occlusions.

Full‑sequence temporal consistency

• SCAIL reasons over the full motion sequence to inject pose information coherently through time.
• This produces fewer flickers, better frame‑to‑frame consistency, and smooth motion continuity in long clips.

Robust to large motion and stylized characters

• SCAIL handles big deformations, multi‑character interactions, and stylized domains (anime, illustrated characters) without requiring per‑frame pose skeletons.
• The result is reliable motion adherence even when the driving video includes extreme camera or body movement.

Input Parameters

Core Inputs

Dimensions & Settings

How SCAIL compares to other models

1. Vs Wan 2.2 Animate

The Core Difference: Structural Stability vs. Generative Fluidity

• Motion Integrity (SCAIL Wins): SCAIL uses spatial constraints to strictly "lock" the character's body structure. Even during rapid spins, backflips, or complex dances, SCAIL rarely hallucinates extra limbs or distorts the face. In contrast, Wan 2.2 Animate is a diffusion-based generative model; while it creates beautiful lighting, it may suffer from "body morphing" or shape distortion when the driving motion is too fast or complex.
• Background Stability: SCAIL tends to keep the background stable or static (focusing purely on the character), whereas Wan 2.2 might attempt to animate or hallucinate background movements, which can sometimes distract from the main subject.

> Verdict:

> * Choose SCAIL if: You are animating dance choreography, gymnastics, or martial arts where limb precision and body structure must not break.

> * Choose Wan 2.2 if: You need cinematic lighting and atmospheric consistency, and the movement is relatively gentle (e.g., walking, talking).

2. Vs One-to-All Animation

The Core Difference: Stylized Flexibility vs. Photorealistic Texture

• Style Compatibility (SCAIL Wins): SCAIL is exceptionally robust with Non-Photorealistic Rendering (NPR), such as Anime, Cartoons, Oil Paintings, and Illustrations. It handles the exaggerated proportions of 2D characters better without forcing them into a realistic 3D skeleton. One-to-All (especially the 14B version) is optimized for high-fidelity realism and might struggle to map motion correctly onto a flat, stylized anime character.
• Texture Detail (One-to-All Wins): For real human subjects, One-to-All Animation excels at preserving pore-level skin texture, fabric weaves, and realistic hair flow. SCAIL is stable but may produce slightly smoother or softer textures compared to the crisp detail of One-to-All.

> Verdict:

> * Choose SCAIL if: Your source image is Anime, illustration, or stylized art. It is the best choice for "bringing 2D art to life."

> * Choose One-to-All if: Your source image is a high-res photograph of a real person, and you need the output to look like a 4K movie clip.

API Integration

Developers can seamlessly integrate SCAIL using the RunComfy API with standard HTTP requests and JSON payloads. The API supports straightforward parameterization of prompt, media URLs, and generation settings, enabling rapid prototyping and production workflows.

Note: API Endpoint for SCAIL

Official resources and licensing

• Official Website/Paper: https://arxiv.org/abs/2512.05905
• Github Page: https://github.com/zai-org/SCAIL/blob/master/README.md
• License: Not specified in the provided sources. Review the official paper and product page for terms; commercial use may require a separate agreement.