The Witcher 3: Wild Hunt has just received a graphical update for the Xbox One X. This update enables the game to take advantage of the powerful hardware of the One X and upscale the resolution up to 4K.
The update adds two modes for the Xbox One X, 4k mode and performance mode. In the 4K mode, the resolution will be upscaled to 4K and the FPS will be capped at 30 FPS constant. With the performance mode capping the frames at 60FPS and resolution will be native 1080p.
In order to get access to these two modes all you have to do is Go to Option -> Display -> Advanced. The following screenshots detail the steps you need to follow.
In addition to the two modes, the patch also tweaks the graphics and optimizes it for better performance overall including support for HDR in both Performance and 4K mode. A similar update was released for the PS4 Pro a few weeks back.