To what extent does editing and/or mise-en-scene help to reinforce key themes in the films you have studied?
Both Pans Labyrinth (Del Toro 2006) and City of God (Meirelles 2002) have strong themes in the narrative, than are reinforced by various methods, including editing and mise-en-scene. Binary oppositions and metanarratives are explored via a variety of techniques to create a more cohesive message in both films.
Perhaps City of God's most plot driven theme is corruption, especially in relation to the character Li'l Ze. This is best highlighted in the 'Li'l Ze story' scene. In terms of editing, this scene is a collection of two montages with a scene in the middle. The brothel killing section is slow, with cuts not typical for a scene of such violence. There are no action matches on shots fired, the pace remains steady and slow, methodical like the killings taking place. This allows the spectator to experience the scene better as it allows us to see the enjoyment the character has in killing without the distraction of cuts, and so brings forward the idea that, to Li'l Ze (or Li'l Dice as he was known then), the killings are almost normal, not a surprise or a pivotal moment for him, although of course it is to the narrative and audience. Later in the scene, with the killing montage that sent the film forward in time, editing was also used effectively to reinforce this film. The quick montage used very short takes, and often cut in the middle of takes to create an even more shaky and frantic sequence that makes the violence seem even more gruesome and maniacal than it already is. There are also action matches on gun shots implemented, differing from previously, which are used to transition between times and to speed up one take, which makes the shots even more impactful and visceral. This all contributed to the theme of Li'l Ze's corruption, as it literally shows the spectator the timeline of the character's ascent to the most dangerous hood in the slum, which shows the corruption Ze has been subject to, and his growing potential to corrupt others, as Benny appears in the last shot. So the pace in editing in this scene, and the difference between the two techniques used in the montage, are effective in reinforcing the theme of corruption to the audience, both of Li'l Ze, and for him to corrupt others.
Mise-en-scene is also used in this scene, although to less of an effect, colour and costume specifically are used to show corruption. The 1960s has an oversaturated yellow hue to the whole section, and is especially used in the brothel part. The yellow lighting, yellowish shirt of Li'l Dice, yellowish walls and white-turned-yellow skin of his victims (ie lighting, costume and set/location) via the lights reinforce the colour into the minds of the spectator. Also, the yellow sand and orange bricks (ie location) of the Shaggy killing section is also drenched in the colour. This is important because after the montage, into the 1970s, the main colour palette is blue (the walls, the clothes, the lights of the scene), and the only holdover from the previous colour is Ze's vest. Not only does this create contrast shows the change in Ze - he's gone from the warm yellow to the cold blue, ie corruption, but he still has evidence of the past on him. This again reinforces the theme of corruption as it shows that, regardless of the change, Ze is still young (supported by the dialogue that states that he's 18), which creates an even more horrific idea in the audience's head - that he can be so young and so dangerous suggests a massive amount of corruption to the character, so much so that he's hardly identifiable.
Mise-en-scene especially is used in the Pale Man sequence in Pan's Labyrinth. The theme of Freedom vs Oppression/Fascism is explored in numerous ways throughout the film, and in this scene it's that that Ofelia and the Pale Man, and the things associated with them, represent Freedom and oppression respectively. The lair of the Pale Man is covered in a red and orange colour palette. The walls are red, the fruit (which is her downfall and is almost an enemy in itself) is a deep blood red, and the walls and metal of the set, and the lighting via the fire (and to an extent the Pale Man, as his white colour takes on the colour of the light) are orange, and meld well with the red. As seen later in the scene, this all represents the blood and violence of the Pale Man, shown by the remnants of the fairies that cover the character's face after killing them. It brings a dangerous meaning to the already sinister room, and so relates to the theme of Oppression in that he's a dominating force of death, much like the fascism of Franco's Spain where the film is set. The fact that the colour of the light makes the Pale Man the same orange also shows the spectator that he belongs in the environment of violence and monstrosity. The colour of the set and lighting, and of the Pale Man, are especially important as it contrasts so greatly with Ofelia's costume. The green of her coat and dress are opposite on the colour wheel to the orange and red of the set, showing to what extent that she doesn't belong. She, thematically, represents everything the place doesn't - freedom to the oppression of the lair, innocence to the Pale Man's evil, and this is immediately clear to the spectator via use of colour, costume and set.
Also, the colour and set also show the age of the Pale Man, and so bring to bare the Childhood vs Adulthood theme, or even Old vs New. When the scene ends and she returns to her room, it's flooded in a high contrast blue/green colour, similar to her attire, showing that she now belongs there, in the real world, away from the oppressive place she just was. Her ability to escape and goes to where she belongs perfectly summarizes the theme, and is reinforced by the colour used.
An important theme in City of God is the idea that everyone living there, everyone in the film, is trapped - a victim of the circumstances around them. Location and iconography (within mise-en-scene) are massive contributors to this. For example, aerial shots of the slum in the beginning of the film bring to mind the image of rat runs or mazes - the inhabitants are trapped in a unnavigable, inescapable place that reduces them to animals. This relates to the binary opposition of Passivity vs Choice in City of God, which is also reinforced by mise-en-scene and editing. Rocket is the only character in the film who gets out successfully, and the only discernible difference between him and the others his inability to stoop to the violence and hood lifestyle that is the norm in the slum. This is represented in the film by his locations and their appearance in comparison to the slum. For example, the newspaper office he is shown in is characterized by muted blue and grey tones - of the walls, the computer screens, the costume of the actors (both Rocket and the journalists) are low contrast colour, creating a bland environment that brings about comparisons to the spectator of their own offices and jobs. It works in direct contrast with the high key colour used in the favela - there's even a scene pointing out the hood's penchant for gold jewelry, and most characters wear some variations of yellow or red at some point in the film. It shows the audience that Rocket has chosen a different path, a different way out, that leads to the normality that the average spectator can relate to, and so reinforced the idea that he can chosen the dominant version of normality. In fact, in the opening scene when Rocket is talking about choice while standing in the middle of a standoff, he is wearing the muted blue which is similar to the office, and the colour in the location is also muted, which makes the transition into the past with it's bright palette all the more jarring, and shows that he has already made a choice to live differently to the life being represented there - ie the Tender Trio.
In conclusion, both Pans Labyrinth and City of God use editing and mise-en-scene to reinforce themes to the spectator by using contrast of colour in set and costume, editing in tandem with camera work and the spectator's relationship with the characters for both editing and mise-en-scene to ensure a negotiated reading for the audience.