Edit 2: I discovered that this is a Unity bug in iOS in general with the post processing stack v2.0, i have sent request to fix and wait for response. For reference, https://issuetracker.unity3d.com/issues/ios-post-processing-stack-v2-on-ios-with-a10-or-lower-chip-gives-just-a-dark-screen EDIT: I got a Mac and tested and fog seems to work on Mac, perhaps the iOS is on a old mobile is my guess and maybe not supported in general due to the shader features required. Though i currently have no means to test on iOS on mobile. This is the system running on a Mac, for reference: https://i.imgur.com/vorigGl.jpg Hi, Unfortunately i do not own a Mac or iOS devices to test on, i will try to loan a Mac to test and get back on the tests. You can also contact me in Discord (https://discord.gg/X6fX6J5) for discussing on the matter, it would help a lot if you have some feedback on possible bugs or errors also so i can guide the tests. Also let me know which Unity version you use, it maybe version related. Best, Nasos