Lattice Boltzmann Lighting Models

Geist, Robert; Westall, James

doi:10.1016/b978-0-12-384988-5.00025-5

Cited by 16 publications

(17 citation statements)

References 16 publications

(23 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These discrete values are used to approximate the different terms in the RTE: the radiance distribution is stored in a 3D grid, and light is exchanged between neighboring volume elements, reducing the computation to local interactions only. A variant of these methods postulates a simple photon transport model that describes a diffusion process to compute light transport in participating media based on the lattice-Boltzmann method [Geist et al 2004]. Recently, Fattal [2009] presented an improvement of DOMs to reduce light smearing (due to repeated interpolation) and ray effects (due to discretized directions).…”

Section: Instant Radiosity Methodsmentioning

confidence: 99%

See 1 more Smart Citation

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

View full text Add to dashboard Cite

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.

show abstract

Section: Instant Radiosity Methodsmentioning

confidence: 99%

“…The number of required iterations depend on the resolution of the grid. Similar to [Geist et al 2004] we use two times the longest side of the LPV iterations as a heuristic for the scheme as described above. Obviously this is not feasible for our real-time requirements for reasonably sized LPVs.…”

Section: Iterationsmentioning

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

View full text Add to dashboard Cite

show abstract

“…Instead of solving the diffusion equation, an alternative way to simulate multiple scattering in participating media is to use Lattice Boltzmann methods to trace the photon transport on a discrete grid [27]. To correctly handle the light transport near detailed boundaries of translucent objects, high-resolution grids are needed, though makes the simulation difficult to fit into limited GPU memory even for relatively simple objects [28].…”

Section: Related Workmentioning

confidence: 99%

“…To correctly handle the light transport near detailed boundaries of translucent objects, high-resolution grids are needed, though makes the simulation difficult to fit into limited GPU memory even for relatively simple objects [28]. Recently, Bernabei et al [29] proposed to overcome the GPU memory limitation by localizing the computation of Lattice Boltzmann lighting.…”

Section: Related Workmentioning

confidence: 99%

TransCut: Interactive Rendering of Translucent Cutouts

Sun

Ren

et al. 2013

IEEE Trans. Visual. Comput. Graphics

View full text Add to dashboard Cite

We present TransCut, a technique for interactive rendering of translucent objects undergoing fracturing and cutting operations. As the object is fractured or cut open, the user can directly examine and intuitively understand the complex translucent interior, as well as edit material properties through painting on cross sections and recombining the broken pieces—all with immediate and realistic visual feedback. This new mode of interaction with translucent volumes is made possible with two technical contributions. The first is a novel solver for the diffusion equation (DE) over a tetrahedral mesh that produces high-quality results comparable to the state-of-art finite element method (FEM) of Arbree et al. but at substantially higher speeds. This accuracy and efficiency is obtained by computing the discrete divergences of the diffusion equation and constructing the DE matrix using analytic formulas derived for linear finite elements. The second contribution is a multiresolution algorithm to significantly accelerate our DE solver while adapting to the frequent changes in topological structure of dynamic objects. The entire multiresolution DE solver is highly parallel and easily implemented on the GPU. We believe TransCut provides a novel visual effect for heterogeneous translucent objects undergoing fracturing and cutting operations.

show abstract

“…Lattice-Boltzmann methods are thus often regarded as computational alternatives to finite-element methods (FEMs), and as such they have have provided significant successes in modeling fluid flows and associated transport phenomena [2][3][4][5][6]. They provide stability, accuracy, and computational efficiency comparable to FEMs, but they offer significant advantages in ease of implementation, parallelization, and an ability to handle interfacial dynamics and complex boundaries.…”

Section: Introductionmentioning

confidence: 99%

Lattice-Boltzmann Water Waves

Geist

Corsi

Tessendorf

et al. 2010

Advances in Visual Computing

Self Cite

View full text Add to dashboard Cite

Abstract.A model for real-time generation of deep-water waves is suggested. It is based on a lattice-Boltzmann (LB) technique. Computation of wave dynamics and (ray-traced) rendering for a lattice of size 1024 2 can be carried out simultaneously on a single graphics card at 25 frames per second. In addition to the computational speed, the LB technique is seen to offer a simple and physically accurate method for handling both dispersion and wave reflection from obstructing objects.

show abstract

Lattice Boltzmann Lighting Models

Cited by 16 publications

References 16 publications

Cascaded light propagation volumes for real-time indirect illumination

Cascaded light propagation volumes for real-time indirect illumination

TransCut: Interactive Rendering of Translucent Cutouts

Lattice-Boltzmann Water Waves

Contact Info

Product

Resources

About