Matakuliah
Tahun
: UO714 / Technology for Animation
: 2009
Volumetric FX
Pertemuan 06
Volumetric FX
.......” special purpose to create cloud or smoke effects in 3d application
Standard 3ds max particle systems are used to control the dynamics of
the smoke, cloud or fire effects
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After Burn plugins
AfterBurn is a production-proven volumetric effects plugin that has been
used in cinematic productions such as Flight of the Phoenix, K-19:
The Widowmaker, Armageddon, Dracula 2000, various IMAX movies
and games such as Warcraft 3, Starcraft, Sin and many others.
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Workflow
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AfterBurn is based on particle system to build a volumetric effect, but
user can choose to use Atmospheric Apparatus Gizmo as well.
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User can preview shape, color and transparency parameters change
directly inside 3ds max viewport. Viewport display is useful to see
AfterBurn effect proportions in relation to the scene, but any serious
noise adjustment should be done in main preview window.
Rendering
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AfterBurn comes with three different rendering engines:
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RayMarcher engine is a high-quality rendering engine in AfterBurn. It is capable of producing very crisp
shadows on high-density smoke, explosions and clouds. Light interaction algorithms provide superb
lighting and shadowing. However, they have a serious impact on the rendering speed because of
complex calculations between AfterBurn and light interaction. Therefore, use it only if you really need the
photorealistic output that the Raymarcher offers in your animation. Use AfterBurn Shadow Map to reduce
rending time significantly.
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The OctaneShader provides up to 10 times the rendering speed of the RayMarcher, but lacks the
latter’s crisp, self-shadowed volumetrics. This render engine is good for light dust and background
smoke or "atmosphere" in your scenes
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HyperSolids is a completely different approach in volumetrics rendering and it’s built into AfterBurn
since version 2.0. Using this technology it is possible to render liquids and other objects without a single
polygon. Along with metaball shape, users can create liquids and similar continuous surfaces that render
very fast. With built in antialiasing the effect renders smooth, without artifacts.
Shadow
AfterBurn comes with a highly optimized volumetric AfterBurn
Shadow Map plugin that allows fast shadows rendering. In
comparison with earlier versions of AfterBurn, rendering times can
be even tenfold faster, while keeping the same quality.
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Daemon
AfterBurn Daemons are helper objects that affect AfterBurn and
AfterBurn Combustion in different ways. (Think of them as “Space
Warps for volumetrics.”) These daemons affect the volumetric
effects by altering the noise and shape of the puffs.
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Daemon
With Swirl Daemon user can create a vortex-like effect. It has
animated strength and falloff allowing user to fine tune amount of
swirling, or to fade it based on the Swirl Daemon object position.
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Daemon
Explode Daemon is used to create realistic explosion-like shading of
the volume. User can easily adjust radial color gradation, ranging from
center of the particle to the edge. Several blending modes allow user
to choose how colors from AfterBurn and from Daemon will be mixed.
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