for my own custom blitz terrain world editor, I put the camera top down and used the mouse to control an object eg,tree and have a clone routine so that you can stamp the trees onto the terrain via
bt getgroundheight(terrain,x,z)
do the same with other objects, maybe use the number keys to select different buildings and models.
With a little effort you could export a file with the objects and their positions which could be read by the game engine you are using the terrain in.
I personally use randomized tree positions cross checked against height values. i just use the mouse to raise and lower terrain.
also, blitz terrain will work with a heightmap or a blitz terrain file, i think T.E.D exports as a model which would not work with blitzterrain.
kezzla
Sometimes I like to use words out of contents