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Old python exporter in 3.0 and earlier ordered faces by material, but the new C++ exporter in 3.1+ did not, and was just writing them in whatever is the order of the mesh data structure. This mostly does not cause problems, except in some apps e.g. Procreate -- for large enough meshes, this lack of "order by material" (which ends up having more usemtl lines) ends up creating more mesh subsets than necessary inside Procreate. The change is not computationally heavy, e.g. exporting 6-level subdivided Monkey mesh goes 1085ms -> 1105ms on my machine. Reviewed By: @howardt Differential Revision: https://developer.blender.org/D14368
.. 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.