use the uploaded image as the exact reference for the existing interior keep the architecture room proportions ceiling floor walls windows doors lighting camera angle perspective desks chairs and existing ceiling lamp exactly as they are do not redesign or move any of these elements main change create a large custom built floor to ceiling bookcase against the existing brown back wall the bookcase should follow the exact geometry of the wall and extend from the floor all the way up to the highest point of the sloped ceiling creating a strong architectural feature that fills the entire height of the wall the bookcase should feel fully integrated into the architecture as if it was designed and built specifically for this room design the bookcase should have a calm sophisticated and timeless appearance use a soft neutral colour such as warm off white light greige beige or a muted taupe avoid stark white combine the painted cabinetry with a few carefully selected natural wooden shelves or niches the wood should be warm and refined adding subtle contrast and a luxurious feeling without making the bookcase look busy keep the composition minimal balanced and elegant with a combination of open shelving and subtle closed sections if appropriate the wooden elements should be used sparingly as refined accents the bookcase should feel high end architectural and bespoke rather than like a standard or prefabricated bookshelf existing objects keep the desks and the existing lamp exactly as they are you may remove the printer cardboard boxes loose equipment clutter and other unnecessary objects from the back wall area to create a cleaner and more refined composition do not add unnecessary decorative objects keep the styling restrained and sophisticated overall atmosphere the final result should feel like a high end contemporary architectural interior calm warm elegant and luxurious with the bookcase becoming the main architectural feature of the room do not change anything else in the image besides the back wall and the addition of the bookcase and removal of the clutter preserve the original photograph s perspective lighting and atmosphere
