PandoMural supports these picture formats: PICT, JPEG, GIF, PhotoShop (2.5/3.0), SGI (Silicon Graphics Image), and if you have QuickTime 3.0, BMP and TIFF.
You can have PandoMural randomly choose from a list, to display a different picture each time you restart your computer.
Version 1.1 - Rewrote large portions of the code, updated the PandoMural Configure icon, and made PandoMural Appearance Manager savvy. Added a feature to change the desktop picture at a user defined interval. There are now four choices for positioning a picture on the desktop. Added a new option to choose the next picture in the list as the startup picture.