🗿 Sculpture and 3D art

A sculptor usually starts with a rough block of stone and a clear plan, often sketched out or built first as a small clay model, then slowly removes stone piece by piece using hammers and chisels until the final shape emerges. Carving only ever works in one direction, since once stone is chipped away it cannot be put back, which means a sculptor has to plan extremely carefully and work patiently from rough, large cuts down to fine, delicate details. Because stone can crack or shatter if struck wrong, sculptors also have to understand exactly how their particular type of stone behaves, working with its natural grain instead of fighting against it.

Bronze is a metal made mostly of copper, and when copper is exposed to air, rain and pollution over many years, it slowly reacts and forms a thin greenish layer on its surface called patina, replacing the metal's original shiny brownish colour. This green patina layer is not damage or rust in the way that iron rusts, it actually protects the bronze underneath from further wear, which is part of why so many old bronze statues have survived outdoors for centuries. Some sculptors and museums even encourage or speed up patina forming on purpose, since many people find the aged green colour beautiful and consider it part of the artwork's character.

A mobile sculpture is a hanging artwork made of separate shapes connected by wires or thin rods, carefully balanced so the whole thing can gently turn, swing and shift whenever a breeze or a light touch moves it. Each arm of a mobile has to be precisely weighted and balanced against every other arm, since even a tiny change in one shape can throw off how smoothly the entire structure hangs and moves. Unlike most sculptures, which look the same no matter how much time passes, a mobile is designed to always look at least a little different, since its exact position depends on movement, air and chance rather than staying fixed.

Every sculpture has a centre of gravity, an invisible point where its weight is evenly balanced, and as long as that point stays directly above the base touching the ground, the sculpture will stand steady instead of tipping over. Sculptors sometimes add a heavier, hidden base or weight low down inside a sculpture on purpose, which lowers the centre of gravity and makes a tall, thin or oddly shaped piece far more stable than it looks. Some especially daring sculptures are built to balance right on the very edge of tipping over, letting the artist show off incredible control over weight and balance for a dramatic effect.