The 8 usually has to be present to work in UE3. It's also possible that forced AA is conflicting with post processing in the game and you can't always work around that. It may not always get all aliasing as well. (Such as aliasing from Post Processing or shaders) (In addition, if it's one of the UE3 games that has that stupid ubershader nonsense where you can't disable individual PP effects, you may or may not be getting forced FXAA as well, which definitely will affect how the forced AA looks. As opposed to laying FXAA on top as you would with Reshade or the driver when using AA. You'd have to disable all PP to disable FXAA). It looks decent from the comparisons in the reference post https://abload.de/img/thebureau0x000000003us90.png https://abload.de/img/thebureau0x080010c1lzsc7.png It's clearly getting a lot of sources of aliasing, though there still are some rough edges and some aliasing on the bloom to the right.