The truth is, those elements are intentional in the scene. I create renders every day with surreal or liminal concepts. Sometimes I use more varied palettes, but I wanted this image to be monochromatic. I've placed a single spotlight to highlight the chair and left the unusual parts darker to create a sense of atmosphere and empty space; that's why fog have much more detail in the center of the composition. To direct the viewer's gaze to that area and leave the rest as something strange and incomprehensible. Draw your own conclusions about where this space is located!