I'm very face blind (can't remember what people look like and therefore don't recognize them again), but when I write, I 'see' the action played out in my mind and I write what I'm seeing. (no, I don't see faces) Also I hear it. Otherwise how could I, a soft-spoken, slow speaker be able to write a character who chatters all the time, who is occasionally funny, too , whereas I'm very seldom 'funny.' (not like clever David L.)
I also dream clearly, but again, the people in my dreams (except for family faces) have very vague faces.
I can draw, but not as well as some in my talented family.
On the other hand, I've created floor plans for the children's area in two separate libraries and saw them set up exactly as I had planned them. There was some conflict about the second plan. The person in administration threw out my floor plan and tried to create her own. She finally told me that she couldn't set up the children's room with the book (etc.) collection that we had. That's when I learned she had thrown mine out. So I sent mine again, pointing out how this and that fit the space available. After a few questions (and revisions), the room was set up using my floor plan, which I enjoyed working in for over 10 years before I retired.
So, I guess I have a partial 'mind's eye,' but not for faces.