We have now switched to GGX for both image based lighting and for conventional non ibl lights! Furthermore this release provides a major leap towards greater accuracy and parity between Unity and the 3D views of several existing content creation tools (when viewing the same content). Smoothness maps in particular are very closely matched now! As a downside our new offline convolution is currently slower than the original but we have significant improvements to this in the pipes as I write this! Morten S. Mikkelsen.