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Galactic News
Friday February
7, 2003
Homing Beacon
#78
The latest Homing Beacon has
arrived, and today we get to talk about the Battle of Geonosis! Where in the world is the
rocky terrain of Geonosis? The
overwhelming final act of Episode II was reason enough for repeat
viewings. The chaos of the Clone War battlefield was vividly brought to
life by the digital artists at Industrial Light & Magic under the
leadership of Ben Snow, Visual Effects Supervisor. With the freeze-frame
clarity of DVD, fans can revel in the intricate detail and craftsmanship
of these amazing shots. Here are a handful of behind-the-scenes factoids
from the epic battle.
- The CG models of the
Republic attack gunships had to be extremely detailed to withstand
viewer scrutiny during close-ups. ILM even crafted a version with a
fully decked out interior, which was used as the background for new
bluescreen elements of the actors aboard the gunships shot during
additional photography in London. The real life gunship interior sets
were left in Sydney, so these new shots required digital gunship
interiors.
- To efficiently deliver a
realistic explosion for the gunship that gets shot out of the sky, ILM
built a mandrill of the vessel. A mandrill is an all-blue practical
miniature. It was rigged with pyrotechnics and blown up. The properly
shaped explosion was digitally extracted, interacting with the
properly shaped wreckage, and digital artists replaced the blue
gunship with the computer-generated one.
- Many of the explosions
of the final ground battle were real ones rather than digital
fireballs. They were shot in the backlot at ILM. Explosions were such
in demand that the compositors dipped into the library of explosions
built for the Naboo plains battle from Episode I to fill out the
shots.
- Yoda's command center
was a 1/6th scale miniature.
- Though the Republic
AT-TE walkers were computer-generated, at least one 1/10th scale
miniature was constructed for pyrotechnic purposes. The walker that
gets blown apart by an armor-busting Hailfire missile was first shot
as a miniature against greenscreen. This provided valuable reference
for the animators, though the scale of the resulting miniature
explosion proved unusable as a final element. Also, the miniature was
shot with a static camera while the finished shot had a swooping
camera move that followed the rocket: a CG walker was needed to
properly move with the perspective of the shot.
- A number of subtle
visual clues were incorporated into the design of the shots to help
audiences keep track of who's who. The good guys -- the Republic
clones -- always move from screen right to screen left, while the
Separatist forces moved from screen left to screen right. The sun is
behind the clones, resulting in a gloomier sky behind the Separatists.
Finally, the missile contrails were color-coded to denote allegiance:
the Republic rockets leave clean white trails, while the villains
launch missiles that leave noxious black exhaust.
- To efficiently
communicate the damage sustained by the Trade Federation core ship
blasted out of the sky, two versions of the computer-generated vessel
were made. One bore its standard paint job. The other was the
"distressed" version, with carbon scoring damage painted
across the surface. Both were animated performing the same movement,
and the compositors used animated mattes to gradually reveal the
damaged ship from "behind" the intact one, covering the
transitions with composited fire and explosion effects.
Posted:
by Jedi
Power
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