Since the graphical user interface update there are some items that previously would have had an icon but now don't if they don't have a physical manifestation in your pack. To avoid broken file links in templates we can create a redirect for the missing icon that goes to the unknown icon tile.
For example:
File:Desert Cactus Icon.png #Redirect [[Unknown Icon.png]]
Tlosk 00:59, 26 December 2013 (EST)
