Premium Blank Billboard Mockup Set Landscape ST01 + Mockup of a Highway Billboard in Landscape or Horizontal position during day sunset time, isolated with transparent background and blue sky. Software Required: + Adobe Photoshop CS4 or higher. + No Photoshop? No problem: This file is also editable with the FREE online editing software website Photopea. The designs in the preview images are for illustration purposes, and not included.