beach flower grainy sand leaves lone sand stem yellow concrete grain grainy ice rough texture colors colours footprint impressions indented light patterns shadow textures tracks tire tracks tyre tracks abstract appearance background grains impact impacted rain rain-drops rain-spatter spatter spattered surface surfaces activity animals dogs evidence impressed imprinted imprints paw-prints barefoot barefooted damp-beach-sand direction feet foot footprints gray grey heavy human not-alone parallel prints shadows toes