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The Principled BSDF uses Microfacet closures that include a fresnel term, which are a special case since their weight tends to be near white even if their average contribution is fairly low. The sample weight is scaled by the average fresnel weight to account for this, but the denoising albedo still used the unscaled weight. This was fine for the original denoiser, but apparently OIDN can't handle the resulting albedo pass well. Therefore, this commit adds the described scaling to the albedo pass contribution as well. This problem was described in T69770. Reviewed By: brecht Differential Revision: https://developer.blender.org/D6289
.. 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.