Trees
If you want to add more vegetation to your composition, you can always add more trees.
Resources - Page 3
Welcome to the Resources section, here you will find a compilation of images to make your own Frutiger Aero-style images here. Some of these were used to produce the stock photos from Asadal, a Korean stock photography website that produced thousands of Frutiger Aero artworks in the early 2000s. I recommend you search on the internet for more specific images, as i don't include everything that exists.
