o3de/Gems/Atom/Feature/Common/Registry/system_materials.setreg

{
    "O3DE": {
        "Atom": {
            "Tools": {
                "EditablePathSettings": {
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                    "@gemroot:Atom_Feature_Common@/Assets/Materials/Special/ShadowCatcher.material": false,
                    "@gemroot:Atom_Feature_Common@/Assets/Materials/Special/ShadowCatcher.materialtype": false
                },
                "PreviewablePathSettings": {
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                    "@gemroot:Atom_Feature_Common@/Assets/Materials/Special/ShadowCatcher.material": false,
                    "@gemroot:Atom_Feature_Common@/Assets/Materials/Special/ShadowCatcher.materialtype": false
                }
            }
        }
    }
}