The MeshId is the content ID of the mesh that is to be displayed.
The content ID for a mesh is generated when a developer uploads a mesh to the Roblox website.
How do I create a mesh?
Meshes can currently only be be uploaded using
MeshParts or the game explorer. Once uploaded however, the content ID for the mesh can be used for the MeshId property. For more information on how to do this please see
Articles/Mesh Parts|this tutorial.
In this code sample a
BasePart is instanced with a
DataModelMesh/VertexColor property of the
SpecialMesh is then animated using