YafaRay is a free open-source montecarlo raytracing engine released under the LGPL 2.1 license. Raytracing is a rendering technique for generating realistic images by tracing the path of light through a 3D scene.
Make sure that YafaRay is correctly installed in the appropiate place. See file "INSTALL" for installation details
For more information, see: www.yafaray.org
YafaRay source code is hosted in GitHub.
There are two different types of YafaRay Releases:
Releases for Blender: they include the Blender-Exporter code and the YafaRay Core files, in a package ready to be installed in Blender.
libYafaRay standalone releases: they are intended to be used by 3rd party software and not to be used with Blender.
Please use the GitHub bug tracking system to report bugs in libYafaRay instead of the YafaRay website bug tracking.
GitHub bug tracking (preferred):
YafaRay website bug tracking: http://www.yafaray.org/development/bugtracker/yafaray
This Blender Exporter only works with Blender v2.7x
Don't use the Blender from the distro repositories. Download the Blender official 2.79 builds from: https://download.blender.org/release/Blender2.79
YafaRay only supports one scene in the .blend file. If you have more than one scene, it could cause unexpected results and problems in the new Material Preview Controls.
YafaRay v3 has only limited support for multiple YafaRay versions and forks installed at the same time
If you have several YafaRay versions together, make sure that you enable in Blender first the old and later the new v3 in that order. If you have problems, disable both, restart Blender and enable them in that order.
Having several versions could cause in some cases:
If you have any of these problems, remove any other yafaray folders (or derived forks) from the Blender addons folder and try again. This typically solves most of the problems stated above.
Thank you.