On an avatar, you can try adding this component to the root of the avatar, making sure the avatar has a Component:ObjectRoot, and set CanApply to false. Doing this will ensure that the avatar's material cannot be changed by the Material Tool.
On an avatar, you can try adding this component to the root of the avatar, making sure the avatar has a Component:ObjectRoot, and set CanApply to false. Doing this will ensure that the avatar's material cannot be changed by the Material Tool.