попробуй так:
Код
var wait = new WaitForFixedUpdate();
for (int i = 0; i < RBBase.Length; i++)
{
RBBase[i].transform.SetParent(null);
RBBase[i].useGravity = true;
RBBase[i].isKinematic = false;
RBmesh[i].enabled = true;
RBmesh[i].convex = true;
yield return wait;
}