Identify the methods of making three-dimensional work, including carving (subtractive), modelling, construction and assemblage (additive), and casting, and explain how each method shapes the surface, form and feel of the result

What this dot point is asking

SEAB wants you to identify the methods of making three-dimensional work and to explain how each method shapes the result. The methods divide broadly into subtractive (carving) and additive (modelling, construction and assemblage), with casting as a further important process. This is the foundation of working three-dimensionally in the course. The central insight is that the method of making is not just a technical detail; it shapes the surface, the form and the feel of the finished work, so choosing a method is itself a creative decision.

The answer

The additive and subtractive divide

Sculptural methods divide into two broad families. Subtractive methods start with a solid mass and remove material to reveal a form, like uncovering a shape hidden in a block. Additive methods start with nothing and build a form up by adding material. The difference is fundamental: subtractive work is largely irreversible (you cannot put back what you cut away), so it demands planning, while additive work can be changed, added to and reworked as you go. This divide shapes how the artist thinks and works.

Carving (subtractive)

Carving is the main subtractive method: cutting and chipping away from a solid block of stone, wood or another hard material to reveal the form within. Because material can only be removed, carving requires careful planning and cannot easily be undone. It tends to produce closed, sealed, compact forms with smooth or chiselled surfaces, and the result often reads as solid, permanent and weighty. The grain and character of the material (the figure of wood, the hardness of stone) strongly affect the work.

Modelling, construction and assemblage (additive)

Several methods build form up. Modelling shapes a soft, pliable material such as clay or wax, pressing, adding and refining; it is immediate, reversible and records the touch of the hand, giving active, worked surfaces. Construction (or fabrication) joins separate elements, such as card, wood or metal, into a form, allowing large, open structures that include space rather than being solid mass. Assemblage builds a work from found objects and disparate materials, carrying meaning through the associations of the objects themselves. All are additive, flexible, and open to experiment.

Casting

Casting is a process for translating a form into another material. The artist makes an original (often modelled in clay or wax), makes a mould around it, then pours in a liquid material, plaster, resin or molten bronze, which sets into a copy. Casting captures a modelled surface in a durable, strong or reflective material that could not be carved directly, lets a work exist permanently while keeping the immediacy of modelling, and allows more than one copy from the same mould. It links the additive freedom of modelling to a lasting final material.

Examples in context

Example 1. Ng Eng Teng's modelled forms. Often called the grandfather of Singapore sculpture, Ng Eng Teng worked extensively in modelled and cast forms exploring the human figure. His rounded, weighty modelled surfaces show the additive process recording the hand, and his casting of such forms shows how modelling and casting combine to give immediate yet durable sculpture.

Example 2. A carved stone figure. A traditional carved stone figure, worked subtractively from a single block, reads as solid, permanent and monumental, its closed form and smooth or chiselled surface a direct result of the carving method. Set beside a modelled clay piece, it shows clearly how opposite methods produce opposite surfaces and feelings.

Try this

Q1. Explain the difference between additive and subtractive methods, with an example of each. [3 marks]

• Cue. Subtractive methods remove material from a solid mass (carving stone or wood) and are largely irreversible; additive methods build material up (modelling clay, or construction) and can be reworked.

Q2. Describe the steps of casting a sculpture. [3 marks]

• Cue. Make an original form (often modelled in clay or wax), make a mould around it, pour in a liquid material such as plaster, resin or bronze, let it set into a copy, then remove the mould to reveal the cast form.

Q3. Why is the choice of making method a creative decision, not just a technicality? [2 marks]

• Cue. Because the method shapes the surface, form and feel of the work: carving gives solid permanent forms, modelling records the hand, construction gives open forms, so the method is chosen to suit the intended result.