I have created two Cubes and one bone which controls both objects (cubes). First cube is Red, second one is Blue. In first part of animation Red cube is rotating using bone and Blue cube is Hidden from outliner, in second part of animation Red cube is hidden and Blue cube rotates using same bone. Now when I save this as .blend or .fbx and import it to Unity game engine, and start animating both Cubes are Shown full animation and only rotation is animating. Why doesn't animate Hide on/off option from Blender outliner ?