Rendering fur with three dimensional textures
SIGGRAPH '89 Proceedings of the 16th annual conference on Computer graphics and interactive techniques
Light scattering from human hair fibers
ACM SIGGRAPH 2003 Papers
Efficient multiple scattering in hair using spherical harmonics
ACM SIGGRAPH 2008 papers
Algorithm for computer control of a digital plotter
IBM Systems Journal
Interactive hair rendering under environment lighting
ACM SIGGRAPH 2010 papers
Interactive hair rendering and appearance editing under environment lighting
Proceedings of the 2011 SIGGRAPH Asia Conference
Irradiance gradients in the presence of participating media and occlusions
EGSR'08 Proceedings of the Nineteenth Eurographics conference on Rendering
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We present a fast algorithm for rendering animated hair under a dynamic lighting environment at interactive frame rates. We use spherical harmonics (SH) to represent the environmental lighting. Since SH functions are orthogonal, the environmental light is converted into an SH representation in real time. To compute hair shadows efficiently, the transmittances between a point on a hair strand and the light sources are also represented by SH functions. The intensity at a point on the hair is then efficiently computed by a dot product of the SH coefficient vectors between the environmental light and the transmittance. However, the computation of the transmittance is very time-consuming. Our method reduces the computational cost by using a voxel-based approach to compute the transmittance.