Blizzard has released a blog post detailing Ray Tracing coming to Diablo 4!
On March 26, wanderers can conqueror the horrors of Hell with a suite of new graphical enhancements available to them with patch 1.3.5. Arriving alongside our next content update, Sanctuary will be further imbued with the luscious shadows and enhanced reflections of ray tracing, plus other visual enhancements.
Codex
Ray Tracing: Shadows
Ray Tracing: