As well as targa files i found its also possible to use jpegs. Also has anyone had joy with finding an animated
format (gifs don't seems to work), the reason I mention this is because I noticed when you fight Arch Nemesis, Elites or Signature Mobs their display panel has a small animated Sauron's eye which I thought was quite interesting.
On another note I was in the process of creating a full theme but stopped work when realising we were missing the following asset ID tags;
- Loading screens border
- Fellowship panels
- Raid panels
- Progression Bar