balls-no-surface
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- http://blog.digitaltutors.com/understanding-ambient-occlusion/
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- A ray of light being refracted in a plastic block
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- arnold, motion vector aov
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- Z depth channel viewed within Nuke
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- focal-plane setup enabled (green area is in focus)
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- http://design-draw-visualize.blogspot.com.au
3d art and animation 