/What the visual effects is: Visual effects involve the integration of live-action footage and generated imagery to create environments which look realistic, but would be dangerous, costly, or simply impossible to capture on film. Visual effects using computer generated imagery has recently become accessible to the Independent filmmaker with the introduction of affordable animation and compositing software.
So basically, anything that’s difficult to film thy edited in visual effects to achieve it. For example, the earth breaking into 4 different pieces and then exploding, is impossible to film so we use visual effects for all the broken of pieces of the planet floating in space. This is a very obviously example of visual effects. A lot of time we use visual effects in more subtle areas. For example, if there’s a scene in the story that needs to be in another country, an imaginary location or a city in the future/past. It’s just inefficiency to go to another country or build a set. Visual effects in these situation are really helpful, although if not spent a lot of time/money on it is noticeable that you are using visual effects.
What is required to create the visual effect:
Green Screen: in film and video techniques such as chromakey a blue or green background in front of which moving subjects are filmed and which allows a separately filmed background to be added to the final image.
Green screening is a technique for compositing (layering) two images together. A color range in the top layer is made transparent, revealing another image behind. Also known as the chroma keying technique, it is commonly used in video production and post-production.
DSLR Camera: is a digital camera that combines the optics and the mechanisms of a single-lens reflex camera with a digital imaging sensor, as opposed to photographic film. The reflex design scheme is the primary difference between a DSLR and other digital cameras.
Adobe Premiere Pro: is a timeline-based video editing software application. It is part of the Adobe Creative Cloud, which includes video editing, graphic design, and web development programs.
Adobe After Effects: The most commonly used visual effects software. It’s primary uses include motion graphics (title intros and logo animations) and compositing (adding fake stuff into live footage). This program is great for beginners to visual effects. It’s ease of use and wide range of uses make it the perfect tool for Indy filmmaking and small productions teams..It is a timeline-based video editing software application. It is part of the Adobe Creative Cloud, which includes video editing, graphic design, and web development programs.
How visual effects is Created:
Motion Tracking: you can track the movement of an object and then apply the tracking data for that movement to another object—such as another layer or an effect control point—to create compositions in which images and effects follow the motion. You can also stabilize motion, in which case the tracking data is used to animate the tracked layer to compensate for movement of an object in that layer. You can link properties to tracking data using expressions, which opens up a wide variety of uses.
Motion Capture: you can track the movement of an object and then apply the tracking data for that movement to another object—such as another layer or an effect control point—to create compositions in which images and effects follow the motion. You can also stabilize motion, in which case the tracking data is used to animate the tracked layer to compensate for movement of an object in that layer. You can link properties to tracking data using expressions, which opens up a wide variety of uses.
Rotoscoping: it traces motion picture footage, frame by frame, when realistic action is required. Originally, photographed live-action movie images were projected onto a glass panel and re-drawn by an animator. This projection equipment is referred to as a Rotoscope. Although this device was eventually replaced by computers, the process is still referred to as Rotoscoping. In the visual effects industry, the term Rotoscoping refers to the technique of manually creating a matte for an element on a live-action plate so it may be composited over another background.
Dynamic & Simulators: they are Animations that take place in a virtual world inside the computer software and in order for these forces to interact and move objects we have ‘solvers’, which are basically mathematical code that intends to control the virtual world in the same way the real world behaves. There are many types of solvers, depending on what effect we want to achieve; fluid solvers are based on fluid dynamics, for instance. Solvers take in different parameters depending on what type of effect we want to achieve. For instance, if we where to go into a destruction scenario, we would have to assign things like mass, friction and angular velocity to the objects, so that when the forces are applied they can interact accordingly.
Matte Painting: The concept of matte painting is simple: “Use one or few paintings to replace a background.” Although the concept is so simple, but the technique of matte painting is quite skillful and artistically demanding because the paintings used to replace background have to be realistic enough and support the film style so the audiences can think it’s a real background.
What media products the VFX can be found:
Green screening: The Avengers
Motion Tracking: Avatar
Motion Capture: The Hobbit
Rotoscoping: Tron (1982)
Dynamic & Simulators: used a lot for creating logos and designs
Different visual effects types:
Simulation FX: is computer software that provides an approximate simulation of certain physical systems, such as rigid body dynamics (including collision detection), soft body dynamics, and fluid dynamics, of use in the domains of computer graphics, video games and film.
Matte painting: is a painted representation of a landscape, set, or distant location that allows filmmakers to create the illusion of an environment that is not present at the filming location.
Compositing: s the combining of visual elements from separate sources into single images, often to create the illusion that all those elements are parts of the same scene. Live-action shooting for compositing is variously called “chroma key”, “blue screen”, “green screen” and other names.
Animation: is the process of making the illusion of motion and the illusion of changeby means of the rapid display of a sequence of static images that minimally differ from each other. The illusion as in motion pictures in general is thought to rely on the phi phenomenon.
Match moving: s a cinematic technique that allows the insertion of computer graphics into live-action footage with correct position, scale, orientation, and motion relative to the photographed objects in the shot. The term is used loosely to describe several different methods of extracting camera motion information from a motion picture.
Bluescreen/greenscreen: is a special effects / post-production technique for compositing (layering) two images or video streams together based on color hues (chroma range). The technique has been used heavily in many fields to remove a background from the subject of a photo or video – particularly the newscasting, motion picture and videogame industries.
Computer-generated imagery: is the application of computer graphics to create or contribute to images in art, printed media, video games, films, television programs, shorts, commercials, videos, and simulators. The visual scenes may be dynamic or static, and may be two-dimensional (2D), though the term “CGI” is most commonly used to refer to 3D computer graphics used for creating scenes or special effects in films and television.
Front projection effect: is an in-camera visual effects process in film production for combining foreground performance with pre-filmed background footage.