Each artist has their own folder.

The PNG files in this directory are used as follows:

* [empty.png](empty.png) is the background when
  [debugging faces](https://campaignwiki.org/face/debug/alex/eyes) or
  when you're
  [appending the debug parameter](https://campaignwiki.org/face/gallery/alex/man?debug=1).

* [edit.png](edit.png) is the overlay used when
  [editing an element](https://campaignwiki.org/face/edit/alex/eyes_all_59.png).

* [dwarf.png](dwarf.png) and [elf.png](elf.png) are alternative empty
  elements to use when debugging faces with different proportions
  (such as
  [elves](https://campaignwiki.org/face/debug/alex/hair_elf?empty=elf.png)
  and [dwarves](https://campaignwiki.org/face/debug/alex/hair_dwarf?empty=dwarf.png)).
