Current questions and answers regarding the map editor.

I have a question about mapmaking (Tribes of the East): is it just me, or are many models missing in the map editor for everyone else too? For example: I have a bridge for lava, but there's no bridge for a regular river (meaning the first one has a red highlight underneath, and it wouldn't look good to place it on a river, of course), there are no tree stumps like in the Nival campaigns, and so on. Is it possible to download the missing models from somewhere, or are they hidden somewhere in the game?