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There was a missing normals layer that was requested by the data transfer modifier from the target object. The normal layer was correctly added to the target object. However, it never reached the data transfer modifier because the mesh was copied in `BKE_object_get_evaluated_mesh` (in the call to `get_mesh_for_write`) and the copy does not include the normals layer. The solution is to not use `get_mesh_for_write` here which was only used because `BKE_object_get_evaluated_mesh` returns a non-const `Mesh *`. Mid term, it should actually return a `const Mesh *` to avoid the confusion. Differential Revision: https://developer.blender.org/D13319
.. 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.