XeSS is the newest upscaling technology from Intel and it has been added to LIGHTNING along with other options such as FSR 1 and FSR 2.
Intel XeSS can be enabled for GPUs that support DirectX 12, That's basically all modern graphic cards.
To be able to enable it, make sure to disable other upscaling options such as FSR 1 or FSR 2.
By default, LIGHTNING will still be using the FSR 1.0 for being stable and less heavy than the other two options.
Stay tuned for more intel.