https://wccftech.com/rpcs3-msaa-mgs4-rdr/

The latest version of the PS3 PC emulator RPCS3 packs major improvements and is now able to boot up Metal Gear Solid 4.

One of the biggest changes that comes with the emulator’s latest version is the support for native Multi-Sampling Anti-Aliasing (MSAA) that greatly improves the visuals on various games, including Red Dead Redemption and the Ratchet and Clank series.