maintain the existing design exactly as it is do not add windows no changes to geometry layout materials furniture or colors introduce daylight coming the back of the observer the light should be diffused soft and realistic filling the room with gentle brightness and creating subtle shadows do not add windows or modify the wall structure in any way enhance realism through accurate light behavior global illumination and soft shadow transitions from the front artificial lighting can remain off or very subtle keep the existing atmosphere calm and natural no other changes to the scene preserve original design intent completely do not modify the room s structure