maintain the original design exactly as shown in the reference image do not change add remove move or redesign any architectural elements furniture dimensions proportions layout or decorative details woodwork wherever wood elements are present apply natural solid oak wood in its authentic light natural oak color with realistic grain and a matte finish flooring replace the existing floor finish with off white square ceramic tiles 60 60 cm inspired by typical flooring styles from the 2000s use a subtle slightly warm off white tone with a natural realistic finish lower bunk bed duvet apply pastel light blue gingham checkered fabric to the duvet on the lower bunk upper bunk bed duvet apply pastel yellow gingham checkered fabric to the duvet on the upper bunk critical restrictions preserve the exact original geometry camera angle perspective lighting setup furniture placement and all existing design details only modify the specified materials flooring and duvet fabrics do not introduce any new objects or decorative elements rendering style photorealistic interior visualization realistic material textures natural oak grain accurate fabric patterns and soft natural looking lighting the final render must remain faithful to the original design