Collision - with only destructibles

How do i set it so that certain units can go through destructibles, or perhaps a select destructible, while keeping other different units from doing so? I tried collision but that makes a unit go through everything, not just certain things. i also tried flying movement with reduced height but that doesnt work the way i want either.

i think u posted in the wrong forum :D

I don't think this is possible any other way, however, if you make it a flying unit, you can always place air blockers on places he is not allowed to go.

Just don't forget to set minimum height of the unit to 0 :)

Hmm, I didnt know you could do air blockers...