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Friday Fundas

180 Degree Rule – Can I cross the line?

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180 Degree Rule – Can I cross the line?

Let us consider you are watching a movie and there is a scene which shows a car running at a considerable speed. You see the car entering the left side of the frame and exit on the right side of the frame on a highway background. But now in the next shot without any transition you see the car entering the right side of the frame and exit on the left side. What would you feel? Would you feel disoriented in figuring out which side the car is going? And if the car is actually moving forward? Well to avoid this phenomenon the film making process has framed a guideline called as the 180 degree rule.

180 degree rule is going to be the topic for this week’s Friday Fundas. 180 degree rule refers to the spatial relationship between the characters on screen. Let us look a setup in which two characters are conversing with each other. There is an imaginary line called the axis that connects the two characters. As depicted in the figure below the camera could be placed on either side of this line. This is denoted by Camera A and Camera B.

180 Degree Rule
180 Degree Rule

The shots as taken by the Camera A and B are shown in the illustration of Shot A and Shot B respectively. You would see based on which side the camera is the characters left and right position changes. For instance the green person is on the left in shot A while in shot B he is on the right. If the scene involves dialogue between the two characters and then it is advised to keep the camera on one side of the 180 degree axis line. The camera can move to any position within the side but cannot jump over to the other side. If it jumps over to the other side then it causes the audience to get disoriented like our example on the car scene.

If the shot after the original shot has the camera on the other side of the line then it is called as the Reverse cut. This usually disorients the viewers and their ability to connect to the visuals is lost. However many directors have broken the 180 degree rule to give more conveying newer meanings. These are part of the new wave film making. At most care should be taken when breaking this rule. Some of the directors who had broken this rule and succeeded are Stanely Kubrick (Shining), Peter Jackson (Lord of the Rings) and the Wachowskis (The Matrix).

The Matrix Bullet Time
The Matrix Bullet Time

In the movie The Matrix the bullet time technique is used and while crossing the line the frame is frozen on that time and the logical arrangement of cameras produces a continuous motion to cross the line there by adjusting the orientation of the viewers as well. Many film makers use a buffer shot while crossing the line. The buffer shot would involve a shot along the 180 degree line which separates the two sides. This minimizes the jolt and help in re-orientation of the audience.

Gollum
Gollum

In the movie Lord of the Rings, The Two Towers, Peter Jackson has crossed this line to show Gollum’s split personalities of the good and the bad. The shots in which the Gollum is speaking good, he is on the right side while the shot in which he speaks evil, he is on the left side.

180 degree rule is not a hard and fast rule but film makers should give due respect to this and use this diligently to produce a visual connect for the audience with the movie.

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Friday Fundas

Forced Perspective

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Forced Perspective

Have you ever taken a picture standing in front of Taj Mahal or Washington mall monument actually far away from it and rising up your hand so that the photo looks like you are holding the tip of the monument or tried to take the photo in an angle which appears like you are holding the sun in your hand? I am sure these images strike a bell to you… Well if you have taken these shots… then you have employed a popular technique of optical illusion in movies known as the Forced Perspective.

In this week’s Friday Fundas let us look at the amount of magic this simple technique can create. Optical illusion forms a major part with visual effects in Cinema. It is like a magic show, constructing a scene in a certain way revealing certain portions while hiding the rest to create an illusion. In the Forced perspective the depth of field gets hidden from the viewer. Like in your photo with Taj Mahal you don’t see the distance between the person and the Taj Mahal so you feel they are holding it.

Let us look at some examples in the movies. Consider a movie like the Jurassic Park. Minatures of Dinosaurs had been used in many shots. Have a miniature dinosaur very close to the camera and a person far from the camera. The camera angle is such that it covers the shot so that it appears that the dinosaur is looking down the person while the person is looking up.

Lighting plays an important role with the forced perspective. Both the objects in the scene should have the same amount of lighting so that they actually appear standing close to each other rather than standing apart. As you know light’s intensity decreases as it moves farther away. So the power of lighting should cover the near and far object sufficiently. If not you would reveal the actual distance and there would be no more illusion. Another example is Hagrid’s character in Harry Potter who is tall as compared to the others. Forced perspective was employed to shoot these sequences.

Lord of the Rings Trilogy took Forced perspective to a different level. As the movie involved dwarfs, wizards and hobbits it was very much important for them to create this illusion perfectly. With a still camera the forced perspective is easy to achieve, what if the camera is moving. In order to solve this problem they had constructed the partial set in Lord of the Rings to be move as the camera moves. The movement is done in such a way that the angle of the camera and position of the set does not reveal the actual depth of field between two characters. This is better explained by Peter Jackson and Technicians themselves. Watch the following video

Cinema is a magical medium. The tricks have to be performed the right way to make the show successful. A lot of thoughts go into designing the techniques, and it does involve a lot of science not just art.