Thanks René. I wanted to have a population in TG, because an imported pile of peat would be much heavier. And just to see if it worked.
What you describe in Blender can also be done in Lightwave, though it doesn't work very well (or I am not too good at it), but I also found a way in Marvelous Designer, where I imported a bunch of floating peat blocks, gave them some 'blow up force' so they wouldn't collapse, and let them fall, and they beautifully fell on top of eachother. The handiest (MD) thing is that you can even redirect each block at will.