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Extensions: Clarified license page and update its requirements #104898

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Dalai Felinto merged 1 commits from dfelinto/blender-manual:extensions-license-v2 into blender-v4.2-release 2024-08-22 10:43:28 +02:00
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manual/advanced/extensions/licenses.rst
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Extension Licenses
******************
For add-ons and themes the recommended license is
`GNU General Public License v2.0 or later <https://spdx.org/licenses/GPL-2.0-or-later.html>`__.
For assets, the required license is `Public Domain (CC0) <https://spdx.org/licenses/CC0-1.0.html>`__.
The `Blender Extensions Platform <https://extensions.blender.org>`__ only supports free and open source extensions compliant with the `Blender's license <https://www.blender.org/about/license>`__:
The `Blender Extensions Platform <https://extensions.blender.org>`__ only supports
free and open source extensions compatible with Blender's license:
`GNU General Public License v3.0 or later <https://spdx.org/licenses/GPL-3.0-or-later.html>`__.
* For add-ons, the required license is `GNU General Public License v3.0 or later <https://spdx.org/licenses/GPL-3.0-or-later.html>`__.
This allows extensions to be packed with Blender and distributed in compliance
with the governing principles of the `Blender license <https://www.blender.org/about/license/>`__.
* For themes, the recommended license is `GNU General Public License v3.0 or later <https://spdx.org/licenses/GPL-3.0-or-later.html>`__, but any `GPL-compatible license <https://www.gnu.org/licenses/license-list.en.html#GPLCompatibleLicenses>`__ is supported.
More GPL and LGPL Licenses
==========================
Some third-party add-on libraries may require a different compatible license.
In those cases a few variant versions of GNU GPL are also accepted:
.. list-table::
:header-rows: 1
* - Identifier
- License
* - SPDX:GPL-2.0-or-later
- `GNU General Public License v2.0 or later <https://spdx.org/licenses/GPL-2.0-or-later.html>`__
* - SPDX:GPL-3.0-or-later
- `GNU General Public License v3.0 or later <https://spdx.org/licenses/GPL-3.0-or-later.html>`__
* - SPDX:LGPL-2.1-or-later
- `GNU Lesser General Public License v2.1 or later <https://spdx.org/licenses/LGPL-2.1-or-later.html>`__
* - SPDX:LGPL-3.0-or-later
- `GNU Lesser General Public License v3.0 or later <https://spdx.org/licenses/LGPL-3.0-or-later.html>`__
More Compatible Licenses
========================
In some exceptional cases other licenses may be required. Extensions are still accepted under these licenses:
.. list-table::
:header-rows: 1
* - Identifier
- License
* - SPDX:BSD-1-Clause
- `BSD 1-Clause "Simplified" License <https://spdx.org/licenses/BSD-1-Clause.html>`__
* - SPDX:BSD-2-Clause
- `BSD 2-Clause "Simplified" License <https://spdx.org/licenses/BSD-2-Clause.html>`__
* - SPDX:BSD-3-Clause
- `BSD 3-Clause "New" or "Revised" License <https://spdx.org/licenses/BSD-3-Clause.html>`__
* - SPDX:BSL-1.0
- `Boost Software License 1.0 <https://spdx.org/licenses/BSL-1.0.html>`__
* - SPDX:MIT
- `MIT License <https://spdx.org/licenses/MIT.html>`__
* - SPDX:MIT-0
- `MIT No Attribution <https://spdx.org/licenses/MIT-0.html>`__
* - SPDX:MPL-2.0
- `Mozilla Public License 2.0 <https://spdx.org/licenses/MPL-2.0.html>`__
* - SPDX:Pixar
- `Pixar License <https://spdx.org/licenses/Pixar.html>`__
* - SPDX:Zlib
- `Zlib License <https://spdx.org/licenses/Zlib.html>`__
* For assets used in add-ons, the required license is `Public Domain (CC0) <https://spdx.org/licenses/CC0-1.0.html>`__.