Скачать или смотреть Horizon Pixel Shimmering with Reflection setting

Example of how the Reflections settings from medium to high actually affects the quality of TAA with respect to sub-pixel aliasing, even on surfaces that don't exhibit reflections. This is running on a GTX 1660 at 1800p* (3200x1800) with the exact same graphic settings, only difference is reflections.

The left is reflections on High, the right side is reflections on Medium. Pay attention to the wall above the vendor in the market, as well as the flags on the right side of the screen.

*Note the texture quality looks poor as that is still an unresolved bug with the game at higher resolutions than 1080p on 6GB cards. This has no effect on the sub-pixel aliasing however.