The Marvel Cinematic Universe has over 20 movies spanning 11 years since the first in the franchise – Iron Man, which premiered in 2008. Often, fans don't get to see what goes on behind the scenes of their favorite movies and television shows, but that's changing more and more. There's a lot of work that goes into making films, especially ones as big as the Marvel movies. Some of these are massive sfx, while other details are more subtle.

For instance, in an interview with MixKnowledgy, Black Panther co-editor Michael P. Shawver talked about the use of an absence of music to create a different kind of feeling in the movie. The cinematographer for Doctor Strange, Ben Davis, has described at length the amount of behind-the-scenes time, scheduling and coordination it took to set up the fantastical world-bending shots. For all the amazing writing, producing, directing and acting, there are numerous elements and departments that people don't often think about, that put in a lot of work and have to be in sync to bring to life the shows and movies we love. Sometimes fun, sometimes stressful.

Seeing entertainment from behind the scenes can give different insight to how things work in movies and shows. So here's a look at MCU: 20 Behind The Scenes Photos That Change Everything.

HELA'S SUIT

Cate Blanchett plays Hela in Thor: Ragnarok. Hela is Thor's sister, created before him and used by Odin at a time when he was more warlike. After that time ed, he locked Hela away because her brutality and need to conquer was endless.

Here, Cate wears a “mocap” suit designed to mimic her movements and capture her performance in order to transfer over to the special effects for Hela's outfit. Far less scary without the horns. No stranger to epic fantasy/action-adventure roles, Cate also played the faerie queen in the Lord of the Rings trilogy, movies that also required extensive special effects in addition to the numerous practical effects and props.

WAR MACHINE, FALCON, AND ANTHONY RUSSO GOOFING OFF

Taking a break between Civil War scenes, “War Machine” and “Falcon” are having a laugh, which is quite different from their characters in the movie. Having to choose sides between Iron Man and Captain America, the movie delves into some serious topics.

When a list is created to keep track of powered individuals, those in favor of the new law oppose those who are not in favor of it, and which side is correct is not as clear-cut as it seems. Anthony Russo s in sharing a light-hearted moment with Don Cheadle, Anthony Mackie. This BTS photo shows that there's still time for fun during grueling shoots on emotional, action-packed movies.

GAMORA AND LIL' GAMORA

Seeing double? Not exactly, but Gamora (Zoe Saldana) and lil' Gamora (Ariana Greenblatt) in this BTS photo are shown taking a break to goof off. Very different from in the movie Infinity War, in which Gamora is sacrificed for the soul stone. After Thanos sacrifices his older daughter he meets with the younger version of her in a vision, and she asked him if he did it.

This is the part in the movie where the audience sees a more “sympathetic” side of his character. It was a necessary scene to add even more depth to his character, but didn't change how audiences viewed him and his actions. This behind-the-scenes photo certainly shows a happier picture of what things are like on the set as opposed to Gamora's tragic ending in the movie.

BEFORE THE SNAP

One of the saddest moments in Infinity War is when Spider-Man tries to stay, and he tells Tony that he's sorry. That scene has now been re-purposed into memes and jokes on social media. However it is one of the most emotional parts of the devastating sequence in Infinity War after Thanos (Josh Brolin) snaps his fingers – and it not only made people cry, it made a lot of people angry.

Much of that anger was directed at Star-Lord, who decided to punch the villain in the face when the rest of the team almost had him and the glove. Because of that move, many characters like Spider-Man, Black Panther, Bucky, Doctor Strange, Star-Lord himself and others were lost along with half of all life in the universe. However this behind the scenes photo with Pratt, Holland and Karen Gillian gives a playful upside to an otherwise very sad scene.

BLACK PANTHER AND KEVIN FEIGE

Kevin Feige takes some time out behind-the-scenes to talk to Chadwick Boseman's Black Panther. Black Panther's popularity has broken records all over the place, far exceeding box office expectations and winning numerous awards. All of the movies in the Marvel universe have spectacular special effects, and Black Panther was no exception to that rule.

Behind Feige and Boseman, a green screen is set up, ready for the next scenes. Black Panther featured new technology not seen in other Marvel movies, notably because Wakanda has advancements unknown to the rest of the world. Bringing these to life required extensive work and preparation from the cast and the crew .

THE AVENGERS TOGETHER

At the end of the Avengers movie, Iron Man sacrificed himself in order to save the city. Fortunately, his friends didn't give up so easily and managed to revive him, after which they went out for shawarma. This behind the scenes shot gives some insight into how that scene was filmed.

Hulk (Mark Ruffalo) runs towards his friends in the bodysuit that will allow them to put in the special effects for the the character later on in the editing process. There's “debris” on the ground, and you can clearly see the green screen and the lighting of the set in the background, making this scene far less ominous than it appeared to be in the movie.

LOKI AND BLACK WIDOW POSING TOGETHER

Loki and Black Widow (Scarlett Johansson) were not exactly friends in the Avengers movies. While Loki (Tom Hiddleston) did eventually become something of a reluctant good guy in Infinity War and Thor: Ragnorok, he's more known for his contentious behavior.

Loki is also a trickster, so an illusion or two was never out of the question for the character. Black Widow used this to her advantage in Avengers, letting him insult her, which resulted in her learning his plans regarding Hulk. This behind the scenes photo shows the good friends and colleagues taking a break after filming. Vastly different from their characters in the films.

PREPPING FOR THE INFINITY WAR FIGHT

This scene from Infinity War shows the cast against a green screen backdrop. In the movie, they are in Wakanda, getting ready for battle. Wakanda is a massive country and the amount of special effects used to bring it to life is extensive. While Wakanda was featured in Infinity War, it was, naturally, the main setting in Black Panther.

In that movie, there was an opportunity to create an entire culture and location for the screen from scratch. While a green screen was used, large sets were also built, which required teams of people to complete. Here Okoye (Danai Gurira), Captain America (Chris Evans), Black Widow (Scarlett Johansson), Bucky (Sebastian Stan) and others stand with Black Panther.

HAWKEYE IN ACTION

Three Arri Alexa cameras are lined up for a shot on the set of Captain America: Civil War. Jeremy Renner wasn't in Infinity War, but he's in the trailer for Endgame. His reappearance seems to be a surprise to Black Widow, and fans have speculated that in the snap Hawkeye's family was among those removed from the universe. Many believe that scenario explains the more somber appearance of the character.

This BTS scene photo shows some of the camera work that goes into capturing a scene. While the final scene is seamless, making it appear as though the action was effortless and possibly filmed with one camera, this BTS shot shows that multiple cameras are sometimes used to capture just one fight sequence.

VALKYRIE'S INTRO

This behind the scenes photo shows Taika Waititi and Tessa Thompson going over a scene. Tessa plays Valkyrie in Thor: Ragnarok. She's a mercenary who, at first appearances, doesn't seem to care about anything but getting her bounty. We soon learn that her reluctance to help Thor is because she's the last of her kind, after the rest were ended by Hela.

Here, Taika and Tessa appear to run through Valkyrie's intro scene, when she arrives in her ship. Behind them are several blue screens, which are similar to green screens. In addition to Valkyrie returning for additional movies, the possibility of a female-lead MCU movie starring Tessa Thompson, Scarlett Johansson and Evangeline Lilly has also been mentioned.