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Materials now have an enum to set the emission sampling method, to be either None, Auto, Front, Back or Front & Back. This replace the previous "Multiple Importance Sample" option. Auto is the new default, and uses a heuristic to estimate the emitted light intensity to determine of the mesh should be considered as a light for sampling. Shaders sometimes have a bit of emission but treating them as a light source is not worth the memory/performance overhead. The Front/Back settings are not important yet, but will help when a light tree is added. In that case setting emission to Front only on closed meshes can help ignore emission from inside the mesh interior that does not contribute anything. Includes contributions by Brecht Van Lommel and Alaska. Ref T77889
.. 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.