O2 Filmes

Background
O2 Filmes is a Brazilian production company founded in 1992 and best known for City of God.

1st Logo (1997-October 25, 2019)
Logo: Mostly an in-credit notice where we see a stylized face with its left eye and nose resembling "O2". Underneath it are the words "O2 FILMES", with "O", "F", and "S" bigger than the rest, within a white rectangular box.

Variants:
 * Sometimes, the face is inside a blue box.
 * An early version of this logo has the face's right eye colored in white.
 * A superimposed variant exists, which was mostly used on TV shows.
 * On E No Meio Passa Um Trem, the text "Uma produção" appears above the logo.
 * Domésticas has the same wording above but with a copyright notice underneath.
 * There is an animated variant of this logo whose only known appearance was on Blindness. While the sequence is constantly flickering, we first see the right eye. It blinks and then the left eye pops up, followed by the bottom text wiping in, the nose writing from the top, and lastly the eyebrows appearing and the mouth being drawn. Once the other logos have already formed, the screen stops flashing in which the O2 Filmes logo can be seen blinking and waving its eyebrow. Afterwards, a car passes by, seguing into the opening scene of the film.
 * On Antônia, the text has a dark outer glow effect.
 * Similarly, Clara's Foodland has the logo with a teal glow.
 * In some cases, the logo is entirely in blue.
 * On Wasteland, the box is dark grey.
 * On Rua Augusta, the logo has a grunge texture.

Technique: None.

Music/Sounds: None or the opening/closing of the movie/TV show.

Availability: Common, thanks to its lifespan of over 20 years and a variety of movies and TV shows preserving this logo then and now on recent prints. Was mainly seen at the end of their projects during this period.
 * It made its debut on the short film Um dia e logo depois o outro and last appeared on Brotherhood.
 * The standard variant with just the face and text was seen on Domésticas, Trash, A Janela Aberta, and more.
 * The blue box variant might be more common than the standard one as it was more commonly used on TV shows such as City of Men, Antônia, Clara's Foodland, among others. Films that have this logo at the end include City of God, Waste Land, Last Night, and many more.

2nd Logo (May 21, 2004-April 6, 2012)
Logo: A shiny outline of the face's "O2" body part appears while a blue tube is being filled from the top. Before being completely filled, a black path as well as a straight line emerges from the top, moving to a specific location to form the face's mouth and eyebrow respectively. Then, its right eye is revealed, blinking with its eyebrow shaking up and down while the bottom text in the same fashion as before fades in.

Technique: Simple 3D animation.

Music/Sounds: A film projector sound and then two clicks as the face's eye blink.

Availability: Uncommon, this was mainly seen at the beginning of movies. Debuted on Speaker Phone and was then seen on City of Men, Adrift, and Xingu, among others.

3rd Logo (March 15, 2013-December 18, 2014)
Logo: On a black background, there are many blue pieces are seen floating around. Several of them come together and form the face from before with the remaining pieces being blown away. Simultaneously, the bottom letters "O2 FILMES" individually fly from the bottom right. Shortly after, the pieces are broken apart and blown away.

Technique: CGI animation.

Music/Sounds: Wind blowing and some wind chimes.

Availability: Very rare, due to its short lifespan. Its only known releases are Father's Chair and Last Night. After the retirement of this logo, the company's films are now produced under the O2 Play label.

4th Logo (July 1, 2020-)
Logo: The face is shown to be redone with its right eye containing less eyebrows than before and the strokes more rounded. A few seconds in is simply the face and nothing else. Then, the face winks at us, twisting its eyebrow and having light burst out of it, triggering the sequence of the bottom text "O2 FILMES" to scroll up.

Variants:
 * In most cases, the logo is still.
 * Sometimes, the logo is textless, leaving just the face.

Technique: 2D animation.

Music/Sounds: The ending theme of the show.

Availability: Current. Was seen on September Morning and Maldivas, among others. The textless variant can be seen on Sala de Roteiro and Crônicas da Pandemia. Surprisingly, the animated variant also appeared at the end credits of 7 Prisoners.