If a player attacks a permanent image set in place as a trap to stall enemies I am assuming the image has an AC of 10+size mod as per the spell major image.
If the player succeeds on their attack would the character immediately disbelieve the image?
Would the image move to make them believe that they missed but allow a will save to disbelieve?
Permanent image reads:
This spell functions like silent image, except that the figment includes visual, auditory, olfactory, and thermal elements, and the spell is permanent. By concentrating, you can move the image within the limits of the range, but it is static while you are not concentrating.
Silent image reads:
This spell creates the visual illusion of an object, creature, or force, as visualized by you. The illusion does not create sound, smell, texture, or temperature. You can move the image within the limits of the size of the effect.
Major image reads:
This spell functions like silent image, except that sound, smell, and thermal illusions are included in the spell effect. While concentrating, you can move the image within the range.
The image disappears when struck by an opponent unless you cause the illusion to react appropriately.
The figment subschool reads:
A figment’s AC is equal to 10 + its size modifier.