Fast food brands use various tools and tricks to make burgers looks fatter, bacon look crispier, and lettuce look greener. 

Here are a few examples of advertisements vs. reality. 

KFC Australia's Nacho Box:

Taco Bell's Crunchy Taco: 

What the heck Taco Bell I wanted meet with my crunchy taco @TacoBell

Marco Perez (@thatwhore_marco) March 20, 2014

McDonald's Big Mac: 

Arby's Three Cheese and Bacon sandwich: