Graphics Reference
In-Depth Information
VISUAL
EFFECTS
FIX-IT
SHOTS
2D-TO-3D
CONVERSION
CG
ELEMENTS
GRAPHICS
Figure 7.1
Types of Visual Effects Work.
7.3 Key Differences Between 2D and 3D
The most important differences in visual effects work in 3D compared to
2D are:
• the need to generate a second view of each CG element
• the need to account for the geometry and depth of a 3D scene
Clearly the biggest difference is the need to generate an additional view
for each element. Each of these elements needs to live convincingly in a
live-action scene, so it must take into account the geometry and depth of
the scene into which it is added. A CG element integrated into a live action
scene needs to share the look and feel of the non-CG elements in terms of
apparent roundness and position in Z-depth.
“On DREDD, visual effects supervisor Michael Elson and I agreed
that for any shots using plates or green screen, we set convergence
for each element in each layer. For example, when Dredd bursts
through the door into the Slo-Mo den, you see a near proi le of the
door bulging out in slow motion, then you see it breaking open
and a bad guy getting blown away. You see layers of things moving
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