I am memorizing long passages by taking walks in various memory palaces. In recalling the information, I go sequentially from image to image in a room in a predetermined walk. If I try to look at all images in a room at the same time (beyond those immediately next to where I am) I cannot keep them all in mind. To find out the images on the other side I just follow the links from one image to where I need to go.
How common is it for people to be able to visualize all images in a given room? Is this something that is practiced?