P3D. Well as it turns out, Predrag Drobac is done with RealismShaderPack as it is broken with P3Dv3.3. However, he does continue to put together excellent packages. Now I personally and strongly recommend PTA "P3D Tweak Assistant" [GET IT HERE] to keep you going. It's hands down an amazing program which allows you to completely customize the visual environment within P3D. Ultimate Realism Pack v0.9 includes Pedrag's own sky textures completely reworked from v0.8 all included except predawn, dawn, and postdawn textures (still WIP, will be included in v1.0). Three variant Sun mods, preset file for PTA tool v1.4 and his own version of Eddie's ReShade preset. This pack is made for HDR ON in P3D! HDR OFF will not look good! The pack is tested in P3D v3.2, but it should work in v3.1/v3.3 (latest version of PTA Tool). Get it via the source link.