Deep Screen Space

Shell Splatting forIndirect Lighting of Volumes

Oliver Nalbach, Tobias Ritschel, Hans-Peter Seidel1OutlinePrevious work: Deep Screen Space

Extension to indirect lighting of volumes10/10/2014Oliver Nalbach Shell Splatting for Indirect Lighting of Volumes2

2

"Deep" Screen Space10/10/20143

Deep screen spaceinformationScreen space informationFramebufferOliver Nalbach Shell Splatting for Indirect Lighting of Volumes3Shell Splatting10/10/20144

Level 0Level 1Level 211/41/16Oliver Nalbach Shell Splatting for Indirect Lighting of Volumes4One-Bounce Surface to Volume10/10/20145

Oliver Nalbach Shell Splatting for Indirect Lighting of Volumes5Previous WorkOffline methodsE.g. ray-marching + instant radiosityGeneral but slowRealtime methodsE.g. prefiltered single scatteringFast but limited range of settingsDiffusion-based MethodsE.g. principal ordinate propagationTrade-off, also multiple scattering, but low-frequency indirect light

10/10/20146

Elek et al. 14

Klehm et al. 14

Engelhardt et al. 12Oliver Nalbach Shell Splatting for Indirect Lighting of Volumes6Splatting to Surfaces vs. VolumesSurface10/10/20147

PositionsSegmentsVolumeOliver Nalbach Shell Splatting for Indirect Lighting of Volumes7

Transmittance Interval Map10/10/20148

TransmittanceDepthOliver Nalbach Shell Splatting for Indirect Lighting of Volumes8

Shell-Splatting with Volume Receiver10/10/20149Oliver Nalbach Shell Splatting for Indirect Lighting of Volumes9Jittering10/10/201410

TransmittanceTransmittanceDepthDepthOliver Nalbach Shell Splatting for Indirect Lighting of Volumes10Results10/10/201411

Deep Screen SpaceRay marching / tracing37ms> 1sOliver Nalbach Shell Splatting for Indirect Lighting of Volumes11Results10/10/201412

Oliver Nalbach Shell Splatting for Indirect Lighting of Volumes12ConclusionSupports fully dynamic scenesArbitrarily changing geometryDynamic lightingDeforming, heterogeneous participating mediaProblems / Future WorkLow number of samples dictates low frequency changes in the medium with depthLack of indirect visibility

10/10/201413Oliver Nalbach Shell Splatting for Indirect Lighting of Volumes1310/10/201414Thank you.Project page: http://people.mpi-inf.mpg.de/~onalbach/VolumeSplatting/Contact: onalbach(at)mpi-inf.mpg.deOliver Nalbach Shell Splatting for Indirect Lighting of Volumes14