This example is from Wikipedia and may be reused below a CC BY-SA license. They may be sculpted into many shapes throughout this process, occasionally leading to deep thumb-print like indentations on their surfaces termed regmaglypts. From Wikipedia This example is from Wikipedia and could be reused under a CC https://zionvgmnp.blogolize.com/the-single-best-strategy-to-use-for-sculpted-md-lakewood-75400587