LuxRender 1.4 has a huge list of improvements, including improved real time integration in Blender.
Tadaaa! Here it is at last, the brand new version 1.4 of LuxRender. Version 1.4 is an intermediate step towards the complete rearchitecturing of LuxRender around the LuxCore library that has been designed to use all the processing power of your computer, CPU, GPU, or network nodes. As such there are not many new features in standard Lux but LuxCore integration has made a huge leap forward in this version has you'll notice in the changelog below.
The 1.4 version features many improvements with LuxCore modes like new materials and textures, new light types, much improved real time integration in Blender to name a few key topics.