Well try with ignore_content instead of ignore_passable. If this wont work too, try to build the blocks as map entity, then ignore_passable MUST work.

Acknex umgibt uns...zwischen Dir, mir, dem Stein dort...
"Hey Griswold ... where u gonna put a tree that big ?"
1998 i married my loved wife ... Sheeva from Mortal Kombat, not Evil-Lyn as might have been expected
rayp.flags |= UNTOUCHABLE;