appearance Australia Australian brown bush coloring colors colouring colours contrast contrasting dried drought dry dry-brown-land drying flat grass grasses hardy light outback perspective perspectives river river-bed rough rural sand sandy scrub shrubbery shrubs survival trees vegetation waterless beach coast coastline color colored colour coloured layers levels low-tide ocean open-area rocks rocky sea seashore seaside shade shadows shapes shore shoreline Sizes spray stones stony sunlight sunshine surf surge surging tidal tides variety water waves wet 4WD-vehicles churn churned-up churning conservation conserve conserving damage damaged damaging driving dug-up environment environmental environmentally-unfriendly four-wheel-drive marked marks ocean-edge off-road off-road-driving prints protect protection safety soft-sand surface surfaced surfaces tire-tracks track tracks traction tyre-tracks vehicles vehicles-permitted wild balls balls of grass cracks grainy pebbles tumbleweeds weeds pools puddles