I can’t turn on my custom shader - it simply doesn’t show up in the list of shaders. I thought maybe l had included something incompatible, so I copied an existing, working shader to a new file with a different name. That new shader didn’t show up in the list. I then renamed my shader to the name of a working shader. It then showed up in the list, but when I tried to run it, I got a message about a hash check fail, indicating that there’s some list of approved shaders that will show up, but only run if their hashes match against a pre-approved list. Similarly, I changed a value within one of the other working shaders, which then also gave me the hash check fail message until I changed the value back.