There is a major limitation though; this ray tracing is exclusively available for intact vehicles that are in direct sunlight. Some examples of the ray tracing effects can be viewed over here.
Furthermore, the new Core engine that powers World of Tanks now also supports concurrent rendering. This technique promises higher performance on systems with multi-core processors. The developer says the biggest gains will be seen on systems with a slow processor and a fast video card. For example, laptops could benefit from this.
We’re continuing to improve Core, the graphics engine for World of Tanks. The updated version of the Core engine includes two important technological features:
Concurrent rendering support. Support for more soft and realistic shadows on players’ tanks, all thanks to Ray Tracing technology, previously available only in cinema and animation.
With the introduction of our Ray Tracing (RT) technology—developed at Wargaming with close collaboration with Intel—we can recreate the "main actors" of our game in higher quality; their smallest details will give super-realistic shadows when the sun hits them. Ray Tracing further immerses you in an atmosphere of furious tank combat and provides an even more enjoyable gameplay experience.
Ray Tracing technology will work on all graphics cards that support DirectX 11 API and higher, but only for intact vehicles that are in direct sunlight. You can enable/disable this function in the game settings. The support for brand-new shadows on tanks will be added in the upcoming updates of World of Tanks, after the tests have been completed.