Innate Attack Wall Thickness?

[RicoZaid]

Innate Attack Wall Thickness: (floating and mass discussions too)

Is there a way to make a Wall (Innate Attack) thickness thinner than 1 meter? Or is that the minimum?

You get 1x3 yards per yard of AoE correct? How can you break this down when you shape it? Is this a bunch of 1 yard cubes? Can I make these cubes thinner?

Here is my wall:
Force Wall (Innate Attack: Crush) 12d6
No Wounding, -50%; no die roll 2 points/level, +0%;
Wall, +60%; Persistent , +40%; Area of Affect, 8
yards, +150%; Extended Duration 30x (5 Minutes),
+60%; No Blunt Trauma, -20%; Cancellation, +10%.
[84] B61

Here is another thread that has a Defensive Barrier:
ref: http://forums.sjgames.com/showthread.php?t=88426&page=2

Defensive Barrier: 13d6 (Wall (rigid), +30%; Persistent, +40%; Extended Duration 30x, +60%; Area Effect, 2 yards +50%; No Blunt Trauma -20%; No Knockback -10%; -No Wounding -50%; Sense based (Vision) -20%; Magical, -10%; 1 hr Recharge, -30%; Costs Fatigue: 5, -50%; Requires IQ Roll, -10%; Spell Components, -20%) [39]