Photorealism within interior architectural images

What exactly is photorealism and how do we achieve it? 3D artist Bill Fleming has already published a book on photorealism claiming that there are 10 principles to achieving photorealism. But what impact do they have in achieving photorealism in a very specific form of digital rendering, such as interior architectural images. Although Fleming gives his readers useful principles to follow, his principles are broad and apply to images with no specific subject matter. After identifying and condensing his principles, a new set of principles will be created that is more organized and understood.