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This was discussed with one of the paper author (i.e. Iliyan Georgiev) a while ago on old Lux forum. As far as I remember, it is vertex merging done over volumes among the other things. It isn't very new stuff.
... well it's constant work in progress, but anyways, another big step on a road to nowhere 
No blender 2.8 addon saddlykintuX wrote: ↑Tue Mar 03, 2020 4:14 pm it's here
Mitsuba2
https://www.khronos.org/news/press/khro ... ay-tracingBeaverton, OR – March 17, 2020 – 6:00 AM PT – Today, The Khronos® Group, an open consortium of industry-leading companies creating advanced interoperability standards, announces the ratification and public release of the Vulkan® Ray Tracing provisional extensions, creating the industry’s first open, cross-vendor, cross-platform standard for ray tracing acceleration. Primarily focused on meeting desktop market demand for both real-time and offline rendering, the release of Vulkan Ray Tracing as provisional extensions enables the developer community to provide feedback before the specifications are finalized. Comments and feedback will be collected through the Vulkan GitHub Issues Tracker and Khronos Developer Slack. Developers are also encouraged to share comments with their preferred hardware vendors. The specifications are available today on the Vulkan Registry.
An evolution of this solution has already been implemented in LuxCore: viewtopic.php?f=5&t=1286Egert_Kanep wrote: ↑Wed Mar 18, 2020 11:12 am Don't know if posted already, but an interesting technique for getting better result with normal maps
https://blogs.unity3d.com/2017/10/02/mi ... h-tracing/
