o3de/Gems/Atom/Asset/Shader/Registry/atom_shaders.setreg

{
    "O3DE": {
        "Atom": {
            "Shaders": {
                "BuildVariants": true,
                "Build": {
                    "ConfigPath": "@gemroot:AtomShader@/Assets/Config/Shader"
                }
            }
        }
    }
}