Players are freely able to adjust any and all of their figures on their turn and at any point during their turn including during the attack phase. For this reason, the figure's sculpt blocking line of sight should never be an issue for a single hex figure. It is an issue for double hex figures because they cannot be flipped during attack phase.
Now for aura abilities like Raelin's, you cannot adjust her on your opponent's turn so if her wing is blocking something to the side and back of her (rare) then it is just blocking it, but MotH's shield should never be a problem when attacking.
Now for aura abilities like Raelin's, you cannot adjust her on your opponent's turn so if her wing is blocking something to the side and back of her (rare) then it is just blocking it, but MotH's shield should never be a problem when attacking.