Page 225 - DCAP504_Computer Graphics

Computer Graphics

Visual effects modify the virtual world as shown in figure 14.4.

Figure 14.4: Visual Effects

The word virtual implies creating something that does not exist and making people believe that the
creation is indeed real.
The three scenarios required for VFX are:
1. To check what we want to see does not exist.
2. To check what we want to see is too difficult or dangerous to photograph live.
3. To check what we need to fix something we have photographed.
The output got from visual effects is considered to be of high quality and the effects are more
controllable when compared to the physical processes like constructing miniatures for introducing
special effect shots in places which require crowd scenes to be added. The CGI enables creation of
images which cannot be created using other technologies.

Visual Effects
1. Pyrotechnics such as mortars for earthy explosions and gasoline balls for flaming
are created by visual effects.
2. Stunt related effects like falls or impacts can be created using special effects.
3. A single artist can produce content without using actors, expensive sets or
properties.
4. Wired and unwired techniques can be created using visual effects.

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