Interactive Global Illumination Using Implicit Visibility

Zou, Guangyu; Hua, Jing; Dong, Ming

doi:10.1109/pg.2007.37

Cited by 19 publications

(18 citation statements)

References 38 publications

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“…One such solution is to approximate indirect lighting reflected from surfaces as a set of virtual point lights (VPLs) [Keller 1997;Dachsbacher and Stamminger 2006;Ritschel et al 2008;Nichols and Wyman 2010;Thiedemann et al 2011]. Several methods [Dong et al 2007;Dachsbacher et al 2007;Crassin et al 2011] approximate global illumination using coarsescale solutions computed over a scene hierarchy. More recently, Kaplanyan et al [2010] approximated low frequency indirect illumination in dynamic scenes by computing light propagation over a 3D scene lattice.…”

Section: Related Workmentioning

confidence: 99%

Global illumination with radiance regression functions

et al. 2013

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c) (a) (b) Figure 1: Real-time rendering results with radiance regression functions for scenes with glossy interreflections (a), multiple local lights (b), and complex geometry and materials (c). AbstractWe present radiance regression functions for fast rendering of global illumination in scenes with dynamic local light sources. A radiance regression function (RRF) represents a non-linear mapping from local and contextual attributes of surface points, such as position, viewing direction, and lighting condition, to their indirect illumination values. The RRF is obtained from precomputed shading samples through regression analysis, which determines a function that best fits the shading data. For a given scene, the shading samples are precomputed by an offline renderer.The key idea behind our approach is to exploit the nonlinear coherence of the indirect illumination data to make the RRF both compact and fast to evaluate. We model the RRF as a multilayer acyclic feed-forward neural network, which provides a close functional approximation of the indirect illumination and can be efficiently evaluated at run time. To effectively model scenes with spatially variant material properties, we utilize an augmented set of attributes as input to the neural network RRF to reduce the amount of inference that the network needs to perform. To handle scenes with greater geometric complexity, we partition the input space of the RRF model and represent the subspaces with separate, smaller RRFs that can be evaluated more rapidly. As a result, the RRF model scales well to increasingly complex scene geometry and material variation. Because of its compactness and ease of evaluation, the RRF model enables real-time rendering with full global illumination effects, including changing caustics and multiple-bounce high-frequency glossy interreflections.

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Section: Related Workmentioning

confidence: 99%

Global illumination with radiance regression functions

et al. 2013

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“…Recently, variants of radiosity methods tailored for graphics hardware have also been introduced. Dong et al [2007] achieves interactive global illumination for small scenes, where visibility was evaluated directly on the hierarchical link mesh. Explicit visibility computations can be replaced by an iterative process using antiradiance [Dachsbacher et al 2007].…”

Section: Previous Workmentioning

confidence: 99%

Cascaded light propagation volumes for real-time indirect illumination

Kaplanyan¹,

Dachsbacher

2010

Proceedings of the 2010 ACM SIGGRAPH Symposium on Interactive 3D Graphics and Games

117

101

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Figure 1: Real-time rendering (58fps on a NVIDIA GTX285 at 1280 × 720 resolution) of the "Crytek Sponza" scene (262k triangles, available at http://www.crytek.com/downloads/technology/) using our method for indirect illumination with 3 cascades of light propagation volumes (LPVs, with 50, 25 and 12.5 meters grid spacing; the scene extend is about 37 × 15 × 22m 3 ). Lights, camera, and geometry can be fully dynamic. The time required for the computation of the indirect illumination is about 10 milliseconds only. Right: We add participating media (single-scattering) effects rendering at 34 fps by ray marching through the LPV. The overhead for ray marching is about 18ms. AbstractThis paper introduces a new scalable technique for approximating indirect illumination in fully dynamic scenes for real-time applications, such as video games. We use lattices and spherical harmonics to represent the spatial and angular distribution of light in the scene. Our technique does not require any precomputation and handles large scenes with nested lattices. It is primarily targeted at rendering single-bounce indirect illumination with occlusion, but can be extended to handle multiple bounces and participating media. We demonstrate that our method produces plausible results even when running on current game console hardware with a budget of only a few milliseconds for performing all computation steps for indirect lighting. We evaluate our technique and show it in combination with a variety of popular real-time rendering techniques.

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“…This work requires a pre-processing step on the scene. The AVG can be used in conjunction with imperfect shadow maps as is mentioned in Section III-C. Hierarchial radiosity approaches have been used by Dong et al [12] who created a hierarchy of links between surface elements in the scene and used implicit visibility to evaluate this structure. Another approach, as proposed by Dachsbacher et al [13], is to use a technique similar to hierarchial radiosity, but that does not need visibility queries.…”

Section: Related Workmentioning

confidence: 99%

Approximate Visibility Grids for Interactive Indirect Illumination

Bashford-Rogers

Debattista

Harvey

et al. 2011

2011 Third International Conference on Games and Virtual Worlds for Serious Applications

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The computation of indirect illumination is fundamental to simulate lighting within a virtual scene correctly and is critical when creating interactive applications, such as games for serious applications. The computation of such illumination is typically prohibitive for interactive or real-time performance if the visibility aspect of the indirect illumination is to be maintained. This paper presents a global illumination system which uses a structure termed the Approximate Visibility Grid (AVG) which enables interactive frame rates for multiple bounce indirect illumination for fully dynamic scenes on the GPU. The AVG is constructed each frame by making efficient use of the rasterisation pipeline. The AVG is then used to compute the visibility aspects of the light transport. We show how the AVG is used to traverse virtual point light sources in the context of instant radiosity, and demonstrate how our novel method enables interactive rendering of virtual scenes that require indirect illumination.

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Interactive Global Illumination Using Implicit Visibility

Cited by 19 publications

References 38 publications

Global illumination with radiance regression functions

Global illumination with radiance regression functions

Cascaded light propagation volumes for real-time indirect illumination

Approximate Visibility Grids for Interactive Indirect Illumination

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