THE WHITE BACKDROP. Ground is invisible. a 1 inch tall [stone] pebble is facing left. it is on a 30 foot deep dirt path. the path is facing right. a 1st tree is behind and 3 feet to the left of the pebble. a 2nd tree is -10 feet in front of the 1st tree. it is 2 feet to the left of the pebble. a 3rd tree is behind the 1st tree. 5 evergreens are 40 feet behind the pebble.