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Materials used in grease pencil modifiers have the requirement that they are already used on the object. In the UI dropdown, this restriction is ensured by calling uiItemPointerR with appropriate searchptr and searchpropname, so only giving the user the choice of materials already used on the object. From python though, it was still possible to assign materials outside of this this restriction. This led to reports like T86981 [which have been partially solved by clamping the material index in the modifier code to be in the valid range]. Now make sure we dont assign "invalid" materials through RNA by appropriate RNA pointer functions. This also adds a proper warning (red, alert) in case of the LineArt modifier if such a invalid material is still in the file [same as other modifiers already do]. Differential Revision: https://developer.blender.org/D10873
.. 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 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.