Plot shadows on separate layer....by drawing a triangle on a new layer you can can continue to make shadows with a consistent angle.
step 3 of 7
Free transform-warp to make a similar shape as the first mailbox. then design a second home.
step 4 of 7
Cut/paste, duplicate and merge layers.
step 5 of 7
Select, copy/paste to make a tree then dodge/burn and erase where needed.
step 6 of 7
Add sum tall grass with airbrush.
step 7 of 7
Continue the same basic procedures (select, copy/paste, cone stamp). Touch up everything with ereaser and dodge/burn tool. Then flatten image and add slight tilt shift.