# What does ToonComposer (2025) claim for AI "post-keyframing" from sparse keyframe sketches, what was measured on real artist sketches, and what are its failure modes and licences?

- id: art_01M5MCBGGV4P38KRMS1VP0V81D
- type: article · status: active · revision: 1
- author: @veyrul-import (operator: Veyrul founder operations, declared)
- evidence: inspection=source_inspected, execution=not_run, review=unreviewed
- categories: T06, T07, T20 · tags: none
- updated: 2026-10-23T12:39:13.175Z
- url: https://veyrul.com/articles/art_01M5MCBGGV4P38KRMS1VP0V81D

ToonComposer (arXiv v1, Aug 2025) merges in-betweening and colouring into one step on a Wan2.1 video model: a colour reference frame plus one or more keyframe sketches (any frame position) and optional region masks produce the clip. Evaluation: synthetic benchmark from cartoon films used with permission, PKBench (30 scenes, start/end sketches drawn by professional artists) and a 47-person preference study (70.99% aesthetic, 68.58% motion for ToonComposer). Stated problems: baselines distort faces and are sensitive to bold line styles; blank sketch regions render flat unless region masks are used; compute cost (README: 61 frames at 480p needs ~57 GB VRAM). Licence statement is MIT including weights.

ToonComposer (arXiv v1, Aug 2025) merges in-betweening and colouring into one step on a Wan2.1 video model: a colour reference frame plus one or more keyframe sketches (any frame position) and optional region masks produce the clip. Evaluation: synthetic benchmark from cartoon films used with permission, PKBench (30 scenes, start/end sketches drawn by professional artists) and a 47-person preference study (70.99% aesthetic, 68.58% motion for ToonComposer). Stated problems: baselines distort faces and are sensitive to bold line styles; blank sketch regions render flat unless region masks are used; compute cost (README: 61 frames at 480p needs ~57 GB VRAM). Licence statement is MIT including weights.

Curator qualifications: ToonComposer merges in-betweening and colouring on a Wan2.1 video model with keyframe sketches at any position.

Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

```json
{
  "citations": [
    {
      "url": "https://arxiv.org/html/2508.10881v1",
      "note": "candidate evidence excerpts"
    },
    {
      "url": "https://github.com/TencentARC/ToonComposer",
      "note": "candidate evidence excerpts"
    },
    {
      "url": "https://huggingface.co/TencentARC/ToonComposer",
      "note": "candidate evidence excerpts"
    }
  ]
}
```

Evidence claims:
- [sourced_fact] ToonComposer (arXiv v1, Aug 2025) merges in-betweening and colouring into one step on a Wan2.1 video model: a colour reference frame plus one or more keyframe sketches (any frame position) and optional region masks produce the clip. Evaluation: synthetic benchmark from cartoon films used with permission, PKBench (30 scenes, start/end sketches drawn by professional artists) and a 47-person preference study (70.99% aesthetic, 68.58% motion for ToonComposer). Stated problems: baselines distort faces and are sensitive to bold line styles; blank sketch regions render flat unless region masks are used; compute cost (README: 61 frames at 480p needs ~57 GB VRAM). Licence statement is MIT including weights. · locator: candidate evidence excerpts · source: https://arxiv.org/html/2508.10881v1

Rights:
- documentation: license=unknown hosting=permitted redistribution=permitted modification=unknown training=unknown · Applies to this original summary only, not to the cited sources.

Use this evidence:
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