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Many modifiers and other places use `CustomData_copy_data` to copy data between different meshes. This function assumes that assumes that the source and destination `CustomData` objects are "compatible" in some way. Usually modifiers use `CustomData_copy` to create a compatible new `CustomData` on the new mesh. The issue was that the optimization I added for anonymous attributes broke this compatibility. It avoided copying some attributes when they are no longer used. This lead to attributes being copied incorrectly. D13083 contains ideas for how this could be fixed more generally. For now I just removed the optimization. Differential Revision: https://developer.blender.org/D13083
.. Keep this document short & concise, linking to external resources instead of including content in-line. See 'release/text/readme.html' for the end user read-me. Blender ======= Blender is the free and open source 3D creation suite. It supports the entirety of the 3D pipeline-modeling, rigging, animation, simulation, rendering, compositing, motion tracking and video editing. .. figure:: https://code.blender.org/wp-content/uploads/2018/12/springrg.jpg :scale: 50 % :align: center Project Pages ------------- - `Main Website <http://www.blender.org>`__ - `Reference Manual <https://docs.blender.org/manual/en/latest/index.html>`__ - `User Community <https://www.blender.org/community/>`__ Development ----------- - `Build Instructions <https://wiki.blender.org/wiki/Building_Blender>`__ - `Code Review & Bug Tracker <https://developer.blender.org>`__ - `Developer Forum <https://devtalk.blender.org>`__ - `Developer Documentation <https://wiki.blender.org>`__ License ------- Blender as a whole is licensed under the GNU General Public License, Version 3. Individual files may have a different, but compatible license. See `blender.org/about/license <https://www.blender.org/about/license>`__ for details.