render a modern interior with a sleek staircase only where it is visible in the reference image there is no staircase on the left side of the scene do not add suggest or imply any stairs steps or railings on the left side feature light oak wood for the flooring and furniture use a soft warm white or beige tone for the walls set the ceiling to a warm white do not add any extra frames shelves or decorative elements beyond what is shown in the picture lighting all natural light must come strictly from the camera viewpoint direction no light should enter from the right side or the left side as there are solid walls in those directions use soft diffused frontal daylight with realistic global illumination add a subtle warm glow coming from the floor lamp without overpowering the scene you may add a couple of recessed ceiling spotlights with warm light discreet and realistic style render in high end photorealistic quality with real world materials no sketch look no outlines no edge detection no toon shading preserve the original camera angle and composition ensuring a fully realistic appearance