http://wccftech.com/the-witcher-3-checkerboard-rendering-ps4-pro-super-sampling/

Just yesterday, The Witcher 3 received a new update on PlayStation 4, which added PlayStation 4 Pro support to the game. A few hours ago, some details on how the game is improved on the new Sony console have emerged online.

Digital Foundry started taking a good look at The Witcher 3 on PlayStation 4 Pro, confirming that it uses checkerboard rendering to boost the game’s native 1080p presentation.