This may look artistic to you but rest assured, with the emotion details (mist, ambient lighting, stained wall, etc.) are added into the work, they can be a useful part when it comes to communicate with the client; how do the architect want the final result look like? The most impressive moment of the space when it is fully function? What is the overall lighting atmosphere? Light, shadow, texture, you name it. Emotional factors can significantly enhance the final result.