Final answer:
The need to order a shadowbox extender frame as a base cap extension is contingent on the specific requirements of the artwork and the design preferences.
Step-by-step explanation:
The statement that the shadowbox extender frame should be ordered as a base cap extension cannot be deemed universally true or false without additional context. In framing and presentation of artwork, a shadowbox is used to display and protect objects with depth. A shadowbox extender frame is an additional framing element that increases the depth of the shadowbox allowing it to accommodate thicker items. Whether it should be ordered as a base cap extension depends on the specific requirements of the piece being framed and the design choices.