This instance is from Wikipedia and may be reused below a CC BY-SA license. They may be sculpted into various designs for the duration of this method, from time to time leading to deep thumb-print like indentations on their own surfaces referred to as regmaglypts. From Wikipedia This example is https://sculptedmdlakewood04691.tusblogos.com/36731108/helping-the-others-realize-the-advantages-of-sculpted-md-lakewood