To many drawcalls and no batching


i try to build my bomberman clone - bombzone with unity3d.
I’ve a 21x15 fields grid, there could be up to 315 objects on it (boxes or so…).
When i filled the grid with the 315 boxes (every box has 260 vertices, non static) i get 650 drawcalls. i can’t combine the meshes because the boxes could be destroyed or moved.

All boxes are instantiated at runtime after start. All boxes have the same material.

here is a screenshot:

is there a way to reduce the drawcalls?


(sorry for my bad english)

take a look at this: