A Parallel Architecture for Interactively Rendering Scattering and Refraction Effects

Bernabei, Daniele; Hakke-Patil, Ajit; Banterle, Francesco; Benedetto, Marco Di; Ganovelli, Fabio; Pattanaik, Sumanta; Scopigno, Riccardo

doi:10.1109/mcg.2011.106

Cited by 11 publications

(9 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Early works in computer graphics [9], [10] simulated atmospheric phenomena by modeling the atmosphere with discrete layers. More general media is handled by effectively tracing linear ray segments at each step of a numerical solution of the differential ray equation, derived from either Eikonal equation [19], [20] or Fermat's principle [21], [22]. Similar methods [23], [24] have been proposed for modeling gravitational fields and dynamic systems.…”

Section: Piecewise Linear Propagation Pathsmentioning

confidence: 99%

Tracing Analytic Ray Curves for Light and Sound Propagation in Non-Linear Media

Yeh

Manocha

2016

IEEE Trans. Visual. Comput. Graphics

View full text Add to dashboard Cite

The physical world consists of spatially varying media, such as the atmosphere and the ocean, in which light and sound propagates along non-linear trajectories. This presents a challenge to existing ray-tracing based methods, which are widely adopted to simulate propagation due to their efficiency and flexibility, but assume linear rays. We present a novel algorithm that traces analytic ray curves computed from local media gradients, and utilizes the closed-form solutions of both the intersections of the ray curves with planar surfaces, and the travel distance. By constructing an adaptive unstructured mesh, our algorithm is able to model general media profiles that vary in three dimensions with complex boundaries consisting of terrains and other scene objects such as buildings. Our analytic ray curve tracer with the adaptive mesh improves the efficiency considerably over prior methods. We highlight the algorithm's application on simulation of visual and sound propagation in outdoor scenes.

show abstract

Section: Piecewise Linear Propagation Pathsmentioning

confidence: 99%

Tracing Analytic Ray Curves for Light and Sound Propagation in Non-Linear Media

Yeh

Manocha

2016

IEEE Trans. Visual. Comput. Graphics

View full text Add to dashboard Cite

show abstract

“…Photons with 26directional intensities are stored into each voxel, and they undergo a propagation process where the intensities in each voxel is distributed into its neighbouring voxels based on a diffusion heuristic. Bernabei et al [1] reduced the 26-directional intensities to six principle directions and introduced a ray marching procedure to deposit radiance into the voxels for rendering single scattering. In addition, Billeter et al [2] also used a ray marching framework for rendering single scattering effects, but only for participating media.…”

Section: Related Workmentioning

confidence: 99%

ESLPV: enhanced subsurface light propagation volumes

Koa

Johan

2014

Vis Comput

View full text Add to dashboard Cite

In this paper, we present an Enhanced Subsurface Light Propagation Volumes (ESLPV) method for real-time rendering of translucent materials. Our method is an extension of the Subsurface Light Propagation Volumes (SSLPV) technique. We improve the SSLPV by incorporating a single scattering framework that uses the same Spherical Harmonics (SH) storage structure as the SSLPV. The new single scattering technique deposits radiance as SH coefficients during a ray marching procedure. The final result is rendered using a ray tracer with importance sampling along the camera ray. This framework also enables the ESLPV to render refractive objects. In addition, we also propose a distance transform optimization that can remove the unnecessary computations during the propagation cycle of LPV [17] based methods. A hierarchical propagation process is also proposed to render highly translucent materials. Similar to the SSLPV, our ESLPV method contains no precomputations, and has low storage requirements that is independent of the mesh size.

show abstract

“…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. However, this method is not efficient in modeling the diffusion process over relatively long distances.…”

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

A Parallel Architecture for Interactively Rendering Scattering and Refraction Effects

Cited by 11 publications

References 5 publications

Tracing Analytic Ray Curves for Light and Sound Propagation in Non-Linear Media

Tracing Analytic Ray Curves for Light and Sound Propagation in Non-Linear Media

ESLPV: enhanced subsurface light propagation volumes

TransCut: Interactive Rendering of Translucent Cutouts

Contact Info

Product

Resources

About