Real-time KD-tree construction on graphics hardware
ACM SIGGRAPH Asia 2008 papers
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Ambient occlusion has been tackled in many different ways to inculcate realism into renderings. Ambient occlusion is a crude approximation to global illumination. But performing a full global illumination in real-time has turned out to be computationally expensive. Combined with local rendering models, ambient occlusion can produce renderings which have increased realism.