“…For example, gradient calculations, environmental lighting and soft shadows can be used to significantly enhance the border effect (Engel et al, 2006); bounding volume hierarchy (BVH), adaptive sparse voxel octree (SVO), out-of-core rendering techniques (Richter & Döllner, 2014) and texture compression can be used to improve memory efficiency (Kämpe et al, 2013;Novák & Dachsbacher, 2012). Recently, a nonuniform texture (NUT) has been reported for modelling and visualisation at an urban scale (Kuang, Chan, Yu, & Wang, 2013). In contrast to their top-to-bottom level division, we are more concerned with semantic integrity in a small-scale environment.…”