How can "shell thickness" impact an FDM print?

The concept of "shell thickness" in Fused Deposition Modelling (FDM) is crucial for both surface finish and structural integrity of the printed object. Shell thickness refers to the thickness of the outer walls of the print, which can directly influence how the finished product appears visually and how it withstands mechanical stresses.

A thicker shell generally provides a more robust outer layer that enhances the overall strength and durability of the print. It helps in better load distribution during use and can prevent the inner structure from being exposed to damage. Additionally, a thicker shell can improve the surface finish, leading to fewer visible layer lines and a smoother appearance. It allows for better adhesion between layers and can help in managing the effects of warping or other deformations during the cooling process.

Conversely, a thinner shell may compromise integrity and result in a less polished appearance, making it crucial to select the appropriate shell thickness based on the intended use of the printed object. It is important to note that shell thickness does not affect aspects such as print speed or color, making option C the most comprehensive and relevant choice.