abstract abundance abundant angles appearance background blades edges flattened grass green greenery ground cover plants pushed over texture textures weeds across the river buildings business district city city central cityscape culture late afternoon light lighting modern Perth river river views riverside setting sun shadow shadows skyscrapers sunlight surfaces water waterways sailing water sport arrows blue communicating communication direction directional divergent diverging indication law no-alternative only pointer pointing sign signs specific splitting splitting-up street-sign traffic traffic-flow traffic-sign turn turning two-way white