Mesh Combiner is a little tool which can combine different meshes into one mesh for reduce the amount of batches / draw calls, making your game more optimized.

You can use it in the edit mode and in the play mode from the inspector or via code.


In Unity 2017.3 or higher, the vertex limit is set to 4 billion in combined meshes if their number of vertices is over 65535.
In older versions of Unity, the limit is constant and is set to 65535 (you can not have mesh with over 65535 vertices).