Research:
3D Engine Design 3D Engine Design and Implementation:
- Deferred Shading with Material Variety
- Multi-Resolution Deferred Shading
- Multi-core Rendering
- 3D UI Engine Optimization
Global Illumination and Shadows Global Illumination and Shadows:
- Practical Screen-Space Ambient Occlusion
- Hiearachical Light Gathering
- Pre-Filtered Shadows
- Direct Subsurface Scattering
Surface Details Surface Details:
- Per-Pixel Quadtree Displacement Mapping
[Category]: Biography, Publication, Award

Award: Marquis Who's Who in the World 2010 Biograpee (Marquis Who's Who) [new]
Award: "Shade Your World" Competition 2nd Prize (NVIDIA, GameDev.net, and Softimage)
Award: The Minister of Culture and Tourism of Republic of Korea's Prize (The Ministry of Culture & Tourism of Republic of Korea)
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Publication: A Deferred Shading Technique for Material Variety (Game Engine Gems 2) [new]
Publication: Multi-Resolution Deferred Shading (Game Programming Gems 8) [new]
Publication: Optimizing a 3D UI Engine for Mobile Devices (GPU Pro - Advanced Rendering Technique) [new]
Publication: Real-Time Subsurface Scattering using Shadow Maps (ShaderX7)
Publication: A GPU-Based Light Hierarchy for Real-Time Approximate Illumination (The Visual Computer)
Publication: An Effcient Shadow Texture Algorithm with Shadow Maps (CGI 2008)
Publication: Accurate Per-Pixel Displacement Mapping using a Pyramid Structure (Technical Article)
Publication: Real-Time Approximate Subsurface Scattering on Graphics Hardware (PG 2007)
Publication: Pyramidal Displacement Mapping: a GPU based Artifacts-Free Ray Tracing through an Image Pyramid (VRST 2006)
Publication: Real-Time Neuroevolution to Imitate a Game Player (Edutainment 2006)
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