This PARTUCLARLY type of AA affects shadows (I don't know exactly why). Set this setting correctling requires to interest yourself of this AA technique (go to the web). For example this is very important to put also a specific level of MSAA : from the web ----> "You also are going to have to set the LOD bias so there is no blurring. You must change the LOD bias setting from clamp to allow. This is a general guideline on LOD bias settings. 2x MSAA + 2x SGSSAA: -0.500 4x MSAA + 4x SGSSAA: -1.000 8x MSAA + 8x SGSSAA: -1.500" But juanchioooo, If you don't have have a very high end GPU, I really don't suggest you to try. BETTER TRY : I don't try this kind of tests but 4K (4K NVIDIA DSR) can I think improve a lot the aliasing of shadows (note test = not sure) : is it always better for aliasing and overall quality to increase the resolution, for me it is a better method than sparse grid supersampling (because of OVERALL QUALITY) which with full hd give you a very very strong AA (even for transparacy textures).