Visual effects (VFX) are the process of adding digital visual effects to live-action footage to create a more realistic or otherworldly look. This can involve anything from compositing layers of images together, to adding computer-generated graphics or animations, to simulating realistic physics and other natural phenomena.
There are many different techniques used in VFX, and the specific techniques used will depend on the desired end result and the resources available. Some of the most common techniques include:
- Compositing: This involves combining different layers of images or video together to create a single, seamless image. This can involve combining live-action footage with computer-generated elements, or combining multiple shots taken at different times or locations.
- 3D modeling and animation: This involves creating computer-generated 3D objects and characters, and animating them to move and behave in a realistic or stylized way.
- Simulation: This involves creating computer-generated simulations of natural phenomena, such as fire, water, and cloth, and incorporating them into live-action footage.
- Matte painting: This involves creating a detailed, hand-painted background image that can be used to replace the real-world location in a shot, or to create an entirely fictional location.
- Rotoscoping: This involves tracing over live-action footage frame by frame to create a digital matte that can be used to isolate specific objects or characters in a shot, or to remove unwanted elements.
There are many other techniques used in VFX, and the field is constantly evolving as new technologies and techniques are developed.
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