A rugged chimney cap/rim module, designed for a 5-meter diameter shaft, forms a slightly irregular, broken ring. It is composed of exposed, weathered bricks with numerous chips and fractures, giving it a rough, fragmented appearance. The brickwork is a muted, earthy red-brown, contrasting sharply with the heavy, dark black soot that heavily coats its inner lip. The texture is gritty and coarse from the bricks, with a powdery, uneven feel on the sooted surfaces, feeling solid yet fragile. Realism.