You can’t create meshes inside Roblox Studio, but you can create them inside Blender 3D (and export them into your project). Introducing Blender 3D Blender 3D is a free program under the GNU ...

Inside Roblox Studio, place a new MeshPart into the world by clicking the Plus symbol next to Workspace. Type “mesh” in the search box. You should see MeshPart in the list of available objects.