Real-time editing and relighting of homogeneous translucent materials

Existing techniques for fast, high-quality rendering of translucent materials often fix BSSRDF parameters at precomputation time. We present a novel method for accurate rendering and relighting of translucent materials that also enables real-time editing and manipulation of homogeneous diffuse BSSRDFs. We first apply PCA analysis on diffuse multiple scattering to derive a compact basis set, consisting of only twelve 1D functions. We discovered that this small basis set is accurate enough to approximate a general diffuse scattering profile. For each basis, we then precompute light transport data representing the translucent transfer from a set of local illumination samples to each rendered vertex. This local transfer model allows our system to integrate a variety of lighting models in a single framework, including environment lighting, local area lights, and point lights. To reduce the PRT data size, we compress both the illumination and spatial dimensions using efficient nonlinear wave...

• Type: Journal
• Year: 2008
• Where: VC
• Authors: Rui Wang 0004, Ewen Cheslack-Postava, Rui Wang 0003, David Luebke, Qianyong Chen, Wei Hua, Qunsheng Peng, Hujun Bao
• Keywords: Diffuse Bssrdf, Translucent Material, Translucent Transfer, VC 2008