# @dynamic_box Dynamic level collision geometry. Useful for moving platforms. Must be a child of an [animation bone](./anim.md). ## Name structure ``` @dynamic_box ``` ## Notes Dynamic box colliders are animated when their parent bone is. If a dynamic box moves into a portal which is not animated by its own animation, the portal is closed. If portalable [static geometry](./static.md) exists as a sibling (i.e., animated by the same bone), the collider will be used for portal gun projectile hits and take priority over any coplanar [static collision](./collision.md).