Meshes can be used in a variety of ways in OpenVSP. One of the main uses is to provide a guide for matching parametric VSP-native components to an existing geometry. This can be done manually if close enough is good enough or performed to much greater detail (and accuracy) using Fit Model. Other times, you may only need a mesh to stand in for a mass component. In this case, the mesh itself may be assigned mass properties just like a VSP component. If the mesh is watertight, volume density may be assigned. Thin shell density may also be applied. This tutorial will discuss a few of these introductory examples but will not cover the topics in detail.