1. A system for compositing an augmented reality (AR) scene, the system comprising: (a) an extraction component, operationally connected to a sensing device for capturing a real-world image, to: (i) extract an object from said real-world image into a memory of a data-processing machine, wherein the object defines how to geometrically construct a virtual model of the object according to a predefined rule set; (ii) geometrically construct the virtual model from said object, wherein geometrically constructing the virtual model comprises generating a geometry and texture of the virtual model based on an interpretation of the extracted object according to the predefined rule set, and wherein geometrically constructing the virtual model comprises modifying a property of the virtual model, such that an appearance or behavior of the virtual model upon rendering is different from a corresponding appearance or behavior of the object in the real-world image; and (iii) composite AR content from said constructed virtual model in order to augment said AR content on said real-world image, thereby creating the AR scene.