Measuring and modeling anisotropic reflection
SIGGRAPH '92 Proceedings of the 19th annual conference on Computer graphics and interactive techniques
The irradiance Jacobian for partially occluded polyhedral sources
SIGGRAPH '94 Proceedings of the 21st annual conference on Computer graphics and interactive techniques
Spherical wavelets: efficiently representing functions on the sphere
SIGGRAPH '95 Proceedings of the 22nd annual conference on Computer graphics and interactive techniques
Non-linear approximation of reflectance functions
Proceedings of the 24th annual conference on Computer graphics and interactive techniques
A ray tracing solution for diffuse interreflection
SIGGRAPH '88 Proceedings of the 15th annual conference on Computer graphics and interactive techniques
Radiance Caching for Efficient Global Illumination Computation
IEEE Transactions on Visualization and Computer Graphics
Radiance cache splatting: a GPU-friendly global illumination algorithm
SIGGRAPH '05 ACM SIGGRAPH 2005 Sketches
A ray tracing solution for diffuse interreflection
ACM SIGGRAPH 2007 courses
Theory, analysis and applications of 2D global illumination
ACM Transactions on Graphics (TOG)
Practical Hessian-based error control for irradiance caching
ACM Transactions on Graphics (TOG) - Proceedings of ACM SIGGRAPH Asia 2012
Irradiance gradients in the presence of participating media and occlusions
EGSR'08 Proceedings of the Nineteenth Eurographics conference on Rendering
Radiance cache splatting: a GPU-friendly global illumination algorithm
EGSR'05 Proceedings of the Sixteenth Eurographics conference on Rendering Techniques
Accelerating the irradiance cache through parallel component-based rendering
EG PGV'06 Proceedings of the 6th Eurographics conference on Parallel Graphics and Visualization
| Hi-index | 0.00 |
We describe a new and accurate algorithm for computing translational gradients of incoming radiance in the context of a ray tracing-based global illumination solution. The gradient characterizes how the incoming directional radiance function changes with displacement on a surface. We use the gradient for a smoother radiance interpolation over glossy surfaces in the framework of the radiance caching algorithm. The proposed algorithm generalizes the irradiance gradient computation by [Ward and Heckbert 1992] to allow its use for non-diffuse, glossy, surfaces. Compared to previous method for radiance gradient computation, the new algorithm yields better gradient estimates in the presence of significant occlusion changes in the sampled environment, allowing a smoother indirect illumination interpolation.