Larsen's page

AoN wrote:

Wall of Fire

...
Effect opaque sheet of flame up to 20 ft. long/level or a ring of fire with a radius of up to 5 ft./two levels; either form 20 ft. high

That opaque sheet of fire form along a continuous line, right? You can't break it in multiple segments.

At CL 10 it extends for 200', an AM Filed around a medium-sized creature had a diameter of 25'.
What happens a creature with AM Field pass through the Wall of Fire? Only the segment where he passes is suppressed and the Wall of Fire persists outside of that area, or, as it should do based on your logic, the whole Wall would be suppressed as it is not continuous anymore?

Where is the problem ? The effect doesn't require line of effect once created since it is not an emanation and there is no point of origin.

When the AMF pass through the wall of fire, part of the sheet is suppressed, so it appears as two sheets.

If a spell is an emanation, in my interpretation, everything beyond the AMF is shielded.

The Magic Rules wrote:

Line of Effect: A line of effect is a straight, unblocked path that indicates what a spell can affect. A line of effect is canceled by a solid barrier. It's like line of sight for ranged weapons, except that it's not blocked by fog, darkness, and other factors that limit normal sight.

You must have a clear line of effect to any target that you cast a spell on or to any space in which you wish to create an effect. You must have a clear line of effect to the point of origin of any spell you cast.

Since you can't affect something in an AMF, I would rule that the line stops at the edge of the AMF.

A line being a coutinuous extent of length, it cannot be part before and part after the AMF, so no targeting on the other side.

Obviously you don't block if the hit is going to ruin your shield for you.

In fact, that's the whole criticism, that you need to use your face to save your shield.

Even if you could block 3 times before the shield being destroyed, the same problem would come the 4th when you would use your face to save the shield.

So I don't think this argument really support more resilient shields (eventually indestructible shields).

It seems to me that "shield block" was conceived as a "sacrifice shield" last resort option, but then since it was cool, some designers wanted to have some class/feat make more use of it, so they also added the sturdy shield to make it possible, but now it feels frustrating to be limited to the sturdy.

Maybe each "shield block" dependent feat adding something like 10HP / 1 hardness to the shield used would help characters specializing in this unusual use of the shield?