And I think the way pebbles places itself in the world might be improved.
Pebbles should remove layer of snow, if they were thrown on it
Pebbles should stack on themselves just like snow layers can do it. Or they could be thick enough, so the second layer of pebbles on top didn’t float on air. Maybe full pebbles block would work like a solid block, or like quicksand.
O My God, look how many times this post has been bumped up… Stop indulging in factorio and solve this problem quickly so that this post can end @Gregorius