The Avatar
Pseudodragon Studios
Hm, True Seeing doesn't appear to do anything AFAICT.
Checked through the resource files & searched through the source. The fact part of it exists and is correctly applied by the spell resource, but nothing in the game actually uses it.
dnspy being buggy, found it with grep
True Seeing grants immunity to visual effects & the equivalent of see invisibility.
I guess it makes sense that a blinded person can't be confused by mirror image.
I'm surprised and impressed that they went into that much detail in their implementation of the rules. The tabletop pathfinder rules do state that mirror image does not work if you are invisible or the attacker is blind. BTW how did you find that code?