background clay construction Dirt earth ground Mud relief surface texture track tracks tread activity beach churned-up colors colours conservation conserving curved curving damage damaged damaging environment environmentally-unfriendly foot-prints grainy gray grey impressed impressions imprinted imprints indented light marked marks off-road-driving over-printed patterns prints rough safety sand soft-sand surfaced surfaces tangled terrain textured textures tire-tracks tyre-tracks vehicle-tracks vehicles wild digger excavator machine meadow tool tracked tracked vehicle vehicle city crack pattern pavement route stone tiles town electric evening Nyberg power rail rails railway transport HDR landscape mast sky. clouds tree feet foot footprint footprints footstep footsteps summer trail wander agriculture corn corn-growing field grass green rural Soil spring trace traces tractor abandoned cityscape path scene station stop urban bush bushes fields nature road trees abstract clouds countryside fiery Fractal orange red sky turbulence yellow