Cross-sectional layers of two different particle assemblies shown in panels (a) and (b) generated using the RBDR algorithm. The layer in panel (a) is taken from a highly porous particle aggregate with average coordination number Z = 2.51 and porosity ϕ = 0.67, and panel (b) is a layer from a tightly packed aggregate with Z = 4.05 and ϕ = 0.49. The color bars here denote the coordination number of individual particles.