Code: BSD 3-Clause (LICENSE.txt) for files outside thirdparty/ and the MyPaint brush directory; GitHub shows NOASSERTION because the file has extra notices. Third-party code and brush sets carry their own licenses. The user manual repository has no LICENSE file; its README says CC-BY-NC 4.0, i.e. n…

Code: BSD 3-Clause (LICENSE.txt) for files outside thirdparty/ and the MyPaint brush directory; GitHub shows NOASSERTION because the file has extra notices. Third-party code and brush sets carry their own licenses. The user manual repository has no LICENSE file; its README says CC-BY-NC 4.0, i.e. non-commercial only, a stricter regime than the code. Lineage: the README says OpenToonz is published by DWANGO and based on Toonz Studio Ghibli Version, originally from Digital Video, Inc. and customised by Studio Ghibli; the manual says it is based on the Toonz Harlequin 7.1 User Guide. The brief's wording 'Toonz Ghibli Edition' does not appear; the README says 'Toonz Studio Ghibli Version'. Rationale: README, LICENSE.txt and docs README were read directly. Counterevidence: A SourceForge mirror was said (search snippet, not fetched) to list MIT; that was not verified and is not primary. Uncertainty: The Ghibli-specific customisations are not documented in the README; bundled brush licenses were not audited. Sources: - https://github.com/opentoonz/opentoonz#readme - https://github.com/opentoonz/opentoonz/blob/master/LICENSE.txt - https://github.com/opentoonz/opentoonz_docs#readme Checked: 2026-10-17

{
  "context": "OpenToonz: what licenses apply to the code, the manual and bundled brushes, and what is its Ghibli lineage?"
}