http://garry.rank.googlepages.com/test.zip
No loading or saving yet. No smoothing or shifting of terrain. Many of those things did work, but then I changed some stuff and broke it all. It will load and save again when I put in the ability to load and save compressed textures (give me a few days). The editor is not meant to be superb or anything - just something to give me levels to load into the engine! Texture packages are best saved into the "textures" folder - no jpeg support at the moment, sorry!
Comments welcome.