Visual effects

1. VFX

2. Post-production • Post-production is, in fact, many different processes grouped under one name. These typically include:- • Editing the picture / television program • Writing, (re-)recording, and editing the soundtrack. • Adding visual special effects - mainly computer-generated imagery (CGI) and digital copy from which release prints will be made (although this may be made obsolete by digital-cinema technologies). • Transfer of film to Video or Data with a telecine and Color grading.

3. VFX • Visual effects (commonly shortened to Visual F/X or VFX) are the various processes by which imagery is created and/or manipulated outside the context of a live action shoot. • Visual effects often involve the integration of live-action footage and computer generated imagery (CGI) in order to create environments which look realistic, but would be dangerous, costly, or simply impossible to capture on film. • They have become increasingly common in big-budget films, and have also recently become accessible to the amateur filmmaker with the introduction of affordable animation and compositing software.

4. Visual Effects methods • Rotoscopy • Rig and Wire Removal • Camera Tracking and Match Moving • Green and Blue Screen & 3D elements to interact with live action • Color Correction • Matte Painting

5. Compositing • Itis the combining of visual elements from separate sources into single image, often to create the illusion that all those elements are parts of the same scene

6. Chroma keying • Chroma key compositing (or chroma keying) is a technique for mixing two images or frames together in which a color (or a small color range) from one image is removed (or made transparent), revealing another image behind it. • This technique is also referred to as color keying, color-separation overlay

7. Rotoscoping • Rotoscoping is an animation technique in which animators trace over live-action film movement, frame by frame, for use in animated films. • Originally, pre-recorded live-action film images were projected onto a frosted glass panel and re-drawn by an animator. • This projection equipment is called a rotoscope, although this device has been replaced by computers in recent years. 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.

8. Wire Removal • In an action movie there can be literally hundreds of wire removal shots. A production technique called a “wire gag” is used where the talent is rigged up with wires to either assist him to leap over a tall building with a single bound or as a safety feature to save him from certain death.

9. Rig Removal • A close cousin of wire removal is rig removal. A rig is any kind of device used on the set to hold up an item up for filming. • After the rig has done its job, it must then be removed from the scene. It is usually rigid like a rod or pole. The city fathers were unwilling to cut the light down and the director simply had to have this particular camera position to get his shot. The solution – rig removal.

10. Matchmove and Camera Tracking • If CG elements (the crow in this case) interacts with objects which are a part of the footage (the branch of a tree), then matchmoving is needed for that object or character. • The CG model of that object or character needs to replicate the movement of the actual object or character. • This is important as it can be used to cast shadows, receive reflection, and is also a very good base for animators to plan out their animation.

11. VFX Softwares