Figure 4.
The image illustrates a series of cylindrical models labelled Realisation 1, Realisation 2, and continuing to Realisation n, depicting variations in density. Each cylinder is approximately 1 metre tall and has a diameter of 0.1 metres. An inset shows a closer view of the top of one of the cylinders, revealing complex visual patterns of colours representing different densities. To the right, a colour gradient scale indicates density values ranging from negative 2000 kilograms per cubic metre to negative 1800 kilograms per cubic metre. At the bottom left, there is a three dimensional coordinate system labelled with axes X, Y, and Z.Random field realisations of the core