The function_test.zip file you have requested: Maps / Tutorials / Advanced Mapping Tutorials - 1.11mb is not available. Perhaps try browsing all files for the game Doom III and upload any files you want to share or are missing. This is the only information we could locate:
Ive written several tutorials on the various built-in functions within the doom editor. This map has examples of almost all of them. This really isnt intended for play but for example purposes. Attached in the readme is links to tutorials Use however you want.