Such instruments were able to scan the 19 layers of the ivory sphere. When a "crack" appeared in the virtual image, staff would have to search through all of the photos to find the most fitting image to patch it up.
藉著雷射掃瞄建立象牙球 19 層的構造，然而象牙球的構造實在太複雜了，總有無法發現的死角，使得虛擬影像出現「破面」，就得再一一比對照片，找出最吻合的塊面來修補。