3d classroom interior

Create a 3D structural shell of a Chinese school classroom/computer-lab room from the 1990s: only architecture. Include four walls, floor, and ceiling with correct proportions. Add one wooden classroom door on a side wall (wood frame, frosted glass upper panel, simple metal handle), and multiple large metal-framed windows on the opposite wall (rectangular panes, security bars, thin curtain rail). Materials: faded pale-green painted plaster walls with subtle stains, aged terrazzo or cream ceramic tile floor, off-white ceiling with fluorescent light recesses (no light fixtures), simple baseboards. Keep the room empty: no desks, chairs, computers, posters, boards, clocks, cables, decorations, props, or any interior accessories. Clean topology, crisp edges, PBR-ready, game-ready scale, centered pivot, single room interior.