If I think of the word 'mansion' it does bring up a picture in my head, but as I move around it everything is kinda hazy and I kinda make stuff up as I go along

If I think of the word 'mansion' it does bring up a picture in my head, but as I move around it everything is kinda hazy and I kinda make stuff up as I go along. Like I look at the floor and set it's colour, but then a different view-angle changes it again. With practise though you can make details more permanent. Try closing your eyes and walking around your own house/room. As you've seen it so many times it is far easier to do.