
| Many rendering algorithms willingly sacrifice accuracy, favoring plausible shading with high-performance. We present Modular Radiance Transfer (MRT), an approach for smooth, approximate direct-to-indirect transfer that scales from high-end GPUs to low-end mobile platforms. MRT eliminates scene-dependent precomputation by storing compact transport on simple shapes, akin to bounce cards used in film production. These shapes’ modular transport can be instanced, warped and connected on-the-fly to yield approximate light transport in large scenes. We introduce a prior on incident lighting distributions and perform all computations in low-dimensional subspaces. An extit{implicit lighting environment} induced from the low-rank approximations is in turn used to model secondary effects, such as volumetric transport variation, higher-order irradiance, and transport through lightfields. MRT is a new approach to precomputed lighting that uses a novel low-dimensional subspace simulation of light transport to uniquely balance the need for high-performance and portable solutions, low memory usage, and fast authoring iteration. |
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| @article{loos11modular, author = {Bradford J. Loos and Lakulish Antani and Kenny Mitchell and Derek Nowrouzezahrai and Wojciech Jarosz and Peter-Pike Sloan}, title = {Modular Radiance Transfer}, journal = {ACM Transactions on Graphics (Proceedings of ACM SIGGRAPH Asia 2011)}, volume = {30}, number = {6}, year = {2011}, month = dec, } |