An 85-meter tall, subtly tapered masonry smokestack exhibits a chunky, irregular silhouette. Its rough surface features chipped brick edges, cracked mortar, and a forged iron collar marking an octagonal-to-round transition. Weathered lead-patched bands, a vertical inspection seam, and a ragged rim with missing bricks are visible. Dark soot, lower dampness, and exfoliating flakes mark its solid, aged form. A dark metal liner is visible in the interior top.

An 85-meter tall, subtly tapered masonry smokestack exhibits a chunky, irregular silhouette. Its rough surface features chipped brick edges, cracked mortar, and a forged iron collar marking an octagonal-to-round transition. Weathered lead-patched bands, a vertical inspection seam, and a ragged rim with missing bricks are visible. Dark soot, lower dampness, and exfoliating flakes mark its solid, aged form. A dark metal liner is visible in the interior top.

Tall industrial masonry smokestack tall, subtly tapered from base to top, octagonal-to-round transition hidden by a forged iron collar. Add cracked mortar seams, chipped brick edges, lead-patched maintenance bands, and a ragged rim with missing bricks. Carve a vertical inspection seam, 10 mm deep, running two thirds of the height. Bake high detail of brick courses with non-uniform spacing and occasional replacement stones. Provide vertex color masks: R for soot accumulation up the lee side, G for dampness at lower 12 m, B for exfoliation flakes. UV0 for tiling bricks at 10 pixels per centimeter, UV1 for trim and decals, UV2 for lightmap. Top interior should be darkened with AO and have a thin metal liner ring. Keep silhouette chunky with intentional irregularity, no perfect cylinder look.