What part of the casket is typically designed to provide a smooth visual finish and structure?

The shell covering of a casket is specifically designed to provide a smooth visual finish and contribute to the overall structure. This part of the casket is often made from materials such as wood, metal, or other substances that are crafted to create an aesthetically pleasing exterior. The shell covering not only enhances the appearance of the casket but also plays a functional role in protecting the inner components. A well-designed shell covering improves the visual appeal, ensuring that the casket meets the expectations of both the families involved and the overall market.

While other components like the plywood layer, decorative overlay, and outer casing contribute to the casket's structure and design, the shell covering is the primary element responsible for creating a finished, polished look. The other parts may serve supporting roles or enhance specific aspects, but none fulfill the function of providing a smooth visual finish quite like the shell covering does.