User blog comment:Ducksoup/The Future of Infoboxes on Wikia/@comment-3542404-20150820073131/@comment-3542404-20150821160545

It's tricky to explain, the old infobox could automatically accommodate multiple images with assigned tabs: see here I didn't write this myself, but from what I understand it has it's own class which is separate from called "basicTabber". would be added into |image= instead of using the extra fields and would assume it's "boxy" default style. Basically I'm trying to figure out how to get this dual functionality working again.
 * image=
 * image1=MSN-008XNT Cyclone Gundam Delta.jpg
 * form1=Front
 * image2=MSN-008XNT Cyclone Gundam Delta Rear.jpg
 * form2=Rear
 * image3=MSN-008XNT Cyclone Gundam Delta Flight Mode.jpg