室内光的真实：窗户是唯一的主光源

Create an interior visualisation lit as a real room is lit, with the window doing almost all the work. Show a strong falloff from the window into the room's depth — bright near the glass, noticeably dimmer two metres in, and genuinely dark in the far corner — rather than the uniform illumination that betrays a badly lit render. Detail the bounce light carefully: the floor near the window catching the light and throwing it up onto the ceiling and the underside of the table, the wall opposite the window picking up a soft glow, and the colour of the floor tinting that bounce. Show a hard patch of direct sun on the floor if the sun is out, with its edge slightly softened by the glazing, and the sharp shadow of the window frame within it. Detail the ambient occlusion in every corner, under every piece of furniture and along every skirting. Show no artificial light at all. Photorealistic, single-source daylight, strong falloff, eye-level view.