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Enabling or disabling motion blur requires rebuilding the BVH of affected geometry and uploading modified vertices to the device (since without motion blur the transform is applied to the vertex positions, whereas with motion blur this is done during traversal). Previously neither was happening when persistent data was enabled, since the relevant node sockets were not tagged as modified after toggling motion blur. The change to blender_object.cpp makes it so `geom->set_use_motion_blur()` is always called (regardless of motion blur being toggled on or off), which will tag the geometry as modified if that value changed and ensures the BVH is updated. The change to hair.cpp/mesh.cpp was necessary since after motion blur is disabled, the transform is applied to the vertex positions of a mesh, but those changes were not uploaded to the device. This is fixed now that they are tagged as modified. Maniphest Tasks: T90666 Differential Revision: https://developer.blender.org/D12781
.. 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.