Hum, when you suggested that we could look at the effect of the mirror "moving" to a certain position, that is why I applied the mirror effect before. Also because our reconstruction is based on what is reflected from the mirror.

The mirror functions as a static mirror, or, we can simulate the mirror dynamics. (So instead of not actuating it, we actuate it at the beginning and see how the system reacts to it.) In which case, applying the mirror where it is now is more logical. (My opinion)