A MeshID is a Property. To get a MeshID, you mush have a FileMesh located in SpecialMesh. To get a SpecialMesh, go to Roblox Studio or Visit Solo, then, in Studio, you should see Insert at the very top next to File, Edit, and View. In Visit Solo, you should see Tools at the top. Click on that, then look for View. If you don't have it up, click on View>Explorer, and View>Properties. Look at other pages of meshes to find how to make a mesh. Meshes are very commonly used in planes, balls, clouds, etc.