Hi,
I’m new to ice, and I was experimenting with strands. Could it be done, that strands don’t go through each other. Here is a rendering, so you probably could better understand my problem:

Is this possible? Like I said I’m new to this, and I couldn’t figure out how to fix it. I would be glad for any hint, link, tutorial or so. 
Here is my ICE-Tree:

thank you
mars