Real-Time Global Illumination Using Precomputed Illuminance Composition with Chrominance Compression
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Adoption of Sparse 3D Textures for Voxel Cone Tracing in Real Time Global Illumination
Adoption of Sparse 3D Textures for Voxel Cone Tracing in Real Time Global Illumination Igor Aherne, Richard Davison, Gary Ushaw and Graham Morgan School of Computing, Newcastle University, Newcastle upon Tyne, U.K. [email protected] Keywords: Global Illumination, Voxels, Real-time Rendering, Lighting. Abstract: The enhancement of 3D scenes using indirect illumination brings increased realism. As indirect illumination is computationally expensive, significant research effort has been made in lowering resource requirements while maintaining fidelity. State-of-the-art approaches, such as voxel cone tracing, exploit the parallel nature of the GPU to achieve real-time solutions. However, such approaches require bespoke GPU code which is not tightly aligned to the graphics pipeline in hardware. This results in a reduced ability to leverage the latest dedicated GPU hardware graphics techniques. In this paper we present a solution that utilises GPU supported sparse 3D texture maps. In doing so we provide an engineered solution that is more integrated with the latest GPU hardware than existing approaches to indirect illumination. We demonstrate that our approach not only provides a more optimal solution, but will benefit from the planned future enhancements of sparse 3D texture support expected in GPU development. 1 INTRODUCTION bounces with minimal reliance on the specifics of the original 3D mesh in the calculations (thus achieving The realism of a rendered scene is greatly enhanced desirable frame-rates almost independent of the com- by indirect illumination - i.e. the reflection of light plexity of the scene). The approach entails represent- from one surface in the scene to another. -
An Overview of Modern Global Illumination
Scholarly Horizons: University of Minnesota, Morris Undergraduate Journal Volume 4 Issue 2 Article 1 July 2017 An Overview of Modern Global Illumination Skye A. Antinozzi University of Minnesota, Morris Follow this and additional works at: https://digitalcommons.morris.umn.edu/horizons Part of the Graphics and Human Computer Interfaces Commons Recommended Citation Antinozzi, Skye A. (2017) "An Overview of Modern Global Illumination," Scholarly Horizons: University of Minnesota, Morris Undergraduate Journal: Vol. 4 : Iss. 2 , Article 1. Available at: https://digitalcommons.morris.umn.edu/horizons/vol4/iss2/1 This Article is brought to you for free and open access by the Journals at University of Minnesota Morris Digital Well. It has been accepted for inclusion in Scholarly Horizons: University of Minnesota, Morris Undergraduate Journal by an authorized editor of University of Minnesota Morris Digital Well. For more information, please contact [email protected]. An Overview of Modern Global Illumination Cover Page Footnote This work is licensed under the Creative Commons Attribution- NonCommercial-ShareAlike 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/ 4.0/. UMM CSci Senior Seminar Conference, April 2017 Morris, MN. This article is available in Scholarly Horizons: University of Minnesota, Morris Undergraduate Journal: https://digitalcommons.morris.umn.edu/horizons/vol4/iss2/1 Antinozzi: An Overview of Modern Global Illumination An Overview of Modern Global Illumination Skye A. Antinozzi Division of Science and Mathematics University of Minnesota, Morris Morris, Minnesota, USA 56267 [email protected] ABSTRACT world that enable visual perception of our surrounding envi- Advancements in graphical hardware call for innovative solu- ronments. -
Temporal Voxel Cone Tracing with Interleaved Sample Patterns by Sanghyeok Hong
c 2015, SangHyeok Hong. All Rights Reserved. The material presented within this document does not necessarily reflect the opinion of the Committee, the Graduate Study Program, or DigiPen Institute of Technology. TEMPORAL VOXEL CONE TRACING WITH INTERLEAVED SAMPLE PATTERNS BY SangHyeok Hong THESIS Submitted in partial fulfillment of the requirements for the degree of Master of Science in Computer Science awarded by DigiPen Institute of Technology Redmond, Washington United States of America March 2015 Thesis Advisor: Gary Herron DIGIPEN INSTITUTE OF TECHNOLOGY GRADUATE STUDIES PROGRAM DEFENSE OF THESIS THE UNDERSIGNED VERIFY THAT THE FINAL ORAL DEFENSE OF THE MASTER OF SCIENCE THESIS TITLED Temporal Voxel Cone Tracing with Interleaved Sample Patterns BY SangHyeok Hong HAS BEEN SUCCESSFULLY COMPLETED ON March 12th, 2015. MAJOR FIELD OF STUDY: COMPUTER SCIENCE. APPROVED: Dmitri Volper date Xin Li date Graduate Program Director Dean of Faculty Dmitri Volper date Claude Comair date Department Chair, Computer Science President DIGIPEN INSTITUTE OF TECHNOLOGY GRADUATE STUDIES PROGRAM THESIS APPROVAL DATE: March 12th, 2015 BASED ON THE CANDIDATE'S SUCCESSFUL ORAL DEFENSE, IT IS RECOMMENDED THAT THE THESIS PREPARED BY SangHyeok Hong ENTITLED Temporal Voxel Cone Tracing with Interleaved Sample Patterns BE ACCEPTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE IN COMPUTER SCIENCE AT DIGIPEN INSTITUTE OF TECHNOLOGY. Gary Herron date Xin Li date Thesis Committee Chair Thesis Committee Member Pushpak Karnick date Matt -
Global Illumination for Dynamic Voxel Worlds Using Surfels and Light Probes
Master of Science in Computer Science May 2020 Global Illumination for Dynamic Voxel Worlds using Surfels and Light Probes Dan Printzell Faculty of Computing, Blekinge Institute of Technology, 371 79 Karlskrona, Sweden This thesis is submitted to the Faculty of Computing at Blekinge Institute of Technology in partial ful- filment of the requirements for the degree of Master of Science in Computer Science. The thesis is equivalent to 20 weeks of full time studies. The authors declare that they are the sole authors of this thesis and that they have not used any sources other than those listed in the bibliography and identified as references. They further declare that they have not submitted this thesis at any other institution to obtain a degree. Contact Information: Author(s): Dan Printzell E-mail: [email protected] University advisor: Dr. Prashant Goswami Department of Computer Science Faculty of Computing Internet : www.bth.se Blekinge Institute of Technology Phone : +46 455 38 50 00 SE–371 79 Karlskrona, Sweden Fax : +46 455 38 50 57 Abstract Background. Getting realistic in 3D worlds has been a goal for the game industry since its creation. With the knowledge of how light works; computing a realistic looking image is possible. The problem is that it takes too much computational power for it to be able to render in real-time with an acceptable frame rate. In a paper Jendersie, Kuri and Grosch [8] and in a thesis by Kuri [9] they present a method of calculation light paths ahead-of- time, that will then be used at run-time to get realistic light. -
Global Illumination Compendium (PDF)
Global Illumination Compendium September 29, 2003 Philip Dutré [email protected] Computer Graphics, Department of Computer Science Katholieke Universiteit Leuven http://www.cs.kuleuven.ac.be/~phil/GI/ This collection of formulas and equations is supposed to be useful for anyone who is active in the field of global illu- mination in computer graphics. I started this document as a helpful tool to my own research, since I was growing tired of having to look up equations and formulas in various books and papers. As a consequence, many concepts which are ‘trivial’ to me are not in this Global Illumination Compendium, unless someone specifically asked for them. There- fore, any further input and suggestions for more useful content are strongly appreciated. If possible, adequate references are given to look up some of the equations in more detail, or to look up the deriva- tions. Also, an attempt has been made to mention the paper in which a particular idea or equation has been described first. However, over time, many ideas have become ‘common knowledge’ or have been modified to such extent that they no longer resemble the original formulation. In these cases, references are not given. As a rule of thumb, I include a reference if it really points to useful extra knowledge about the concept being described. In a document like this, there is always a fair chance of errors. Please report any errors, such that future versions have the correct equations and formulas. Thanks to the following people for providing me with suggestions and spotting errors: Neeharika Adabala, Martin Blais, Michael Chock, Chas Ehrlich, Piero Foscari, Neil Gatenby, Simon Green, Eric Haines, Paul Heckbert, Vladimir Koylazov, Vincent Ma, Ioannis (John) Pantazopoulos, Fabio Pellacini, Robert Porschka, Mahesh Ramasubramanian, Cyril Soler, Greg Ward, Steve Westin, Andrew Willmott. -
Capturing and Simulating Physically Accurate Illumination in Computer Graphics
Capturing and Simulating Physically Accurate Illumination in Computer Graphics PAUL DEBEVEC Institute for Creative Technologies University of Southern California Marina del Rey, California Anyone who has seen a recent summer blockbuster has witnessed the dramatic increases in computer-generated realism in recent years. Visual effects supervisors now report that bringing even the most challenging visions of film directors to the screen is no longer a question of whats possible; with todays techniques it is only a matter of time and cost. Driving this increase in realism have been computer graphics (CG) techniques for simulating how light travels within a scene and for simulating how light reflects off of and through surfaces. These techniquessome developed recently, and some originating in the 1980sare being applied to the visual effects process by computer graphics artists who have found ways to channel the power of these new tools. RADIOSITY AND GLOBAL ILLUMINATION One of the most important aspects of computer graphics is simulating the illumination within a scene. Computer-generated images are two-dimensional arrays of computed pixel values, with each pixel coordinate having three numbers indicating the amount of red, green, and blue light coming from the corresponding direction within the scene. Figuring out what these numbers should be for a scene is not trivial, since each pixels color is based both on how the object at that pixel reflects light and also the light that illuminates it. Furthermore, the illumination does not only come directly from the lights within the scene, but also indirectly Capturing and Simulating Physically Accurate Illumination in Computer Graphics from all of the surrounding surfaces in the form of bounce light. -
3Delight 11.0 User's Manual
3Delight 11.0 User’s Manual A fast, high quality, RenderMan-compliant renderer Copyright c 2000-2013 The 3Delight Team. i Short Contents .................................................................. 1 1 Welcome to 3Delight! ......................................... 2 2 Installation................................................... 4 3 Using 3Delight ............................................... 7 4 Integration with Third Party Software ....................... 27 5 3Delight and RenderMan .................................... 28 6 The Shading Language ...................................... 65 7 Rendering Guidelines....................................... 126 8 Display Drivers ............................................ 174 9 Error Messages............................................. 183 10 Developer’s Corner ......................................... 200 11 Acknowledgements ......................................... 258 12 Copyrights and Trademarks ................................ 259 Concept Index .................................................. 263 Function Index ................................................. 270 List of Figures .................................................. 273 ii Table of Contents .................................................................. 1 1 Welcome to 3Delight! ...................................... 2 1.1 What Is In This Manual ?............................................. 2 1.2 Features .............................................................. 2 2 Installation ................................................ -
Fast Global Illumination for Visualizing Isosurfaces with a 3D Illumination Grid
A NATOMIC R ENDERING AND V ISUALIZATION Fast Global Illumination for Visualizing Isosurfaces with a 3D Illumination Grid Users who examine isosurfaces of their 3D data sets generally view them with local illumination because global illumination is too computationally intensive. By storing the precomputed illumination in a texture map, visualization systems can let users sweep through globally illuminated isosurfaces of their data at interactive speeds. isualizing a 3D scalar function is an ing) the equation for light transport. Generally, important aspect of data analysis in renderers that solve the light transport equation science, medicine, and engineering. are implemented in software and are conse- However, many software systems for quently much slower than their hardware-based 3DV data visualization offer only the default ren- counterparts. So a user faces the choice between dering capability provided by the computer’s fast-but-incorrect and slow-but-accurate displays graphics card, which implements a graphics li- of illuminated 3D scenes. Global illumination brary such as OpenGL1 at the hardware level to might make complicated 3D scenes more com- render polygons using local illumination. Local prehensible to the human visual system, but un- illumination computes the amount of light that less we can produce it at interactive rates (faster would be received at a point on a surface from a than one frame per second), scientific users will luminaire, neglecting the shadows cast by any continue to analyze isosurfaces of their 3D scalar intervening surfaces and indirect illumination data rendered with less realistic, but faster, local from light reflected from other surfaces. This illumination. -
Minor Thesis Point Cloud Based Interactive Global Illumination
TECHNISCHE UNIVERSITÄT DRESDEN FACULTY OF COMPUTER SCIENCE INSTITUTE OF SOFTWARE AND MULTIMEDIA TECHNOLOGY CHAIR OF COMPUTER GRAPHICS AND VISUALIZATION PROF.DR.STEFAN GUMHOLD Minor Thesis Point Cloud Based Interactive Global Illumination Mirko Salm (Mat.-No.: 3753374) Tutor: Nico Schertler, M.Sc. Dipl.-Medieninf. Joachim Staib Dresden, 09.03.2015 Aufgabenstellung Globale Beleuchtungseffekte wie indirekte Beleuchtung und Verschattung sind ein signifikanter Faktor für die Realitätsnähe von gerenderten Bildern. Außerdem tragen sie zum besseren Verständnis der Szene bei, indem bspw. die Relationen von Objekten zueinander durch Schatten deutlich werden. Obwohl eine physikalisch korrekte Berechnung der indirekten Beleuchtung möglich ist, sind solche Verfahren sehr rechenintensiv und damit nicht für interaktive Darstellungen geeignet. Ansätze, die Teile der Lichtaus- breitung vorberechnen, können zur Beschleunigung beitragen, jedoch sind diese oft auf statische oder teil-statische Szenen beschränkt. Stattdessen sollen in dieser Arbeit Verfahren untersucht werden, die optisch ansprechende Ergebnisse erzielen. Dabei soll der Fokus auf Effekte der indirekten Beleuch- tung gelegt werden. Nachdem ein fundierter Überblick über solche Verfahren gegeben wurde, soll ein Programm für die Visualisierung von Punktwolken mittels Voxel Cone Tracing implementiert werden. Dabei ist darauf zu achten, dass die Implementierung mit dynamischen Szenen umgehen kann und eine genügend kurze Berechnungszeit aufweist, sodass eine interaktive Visualisierung möglich ist. Die Im- plementierung soll in dem Umfang, den die gewählten Algorithmen erlauben, auf der Grafikkarte laufen. Abschließend ist diese bezüglich Performanz und Qualität zu evaluieren. Teilaufgaben: • Literaturrecherche zu globalen Beleuchtungsmodellen und deren effiziente Implementierung (Light Propagation Volumes, Voxel Cone Tracing, Virtual Point Lights, Instant Radiosity). • Überblick über wesentliche Verfahren zur indirekten Beleuchtung. • Erstellen oder Sammeln von geeigneten Test-Szenen unterschiedlicher Komplexität. -
Real-Time Global Illumination on GPU
Real-Time Global Illumination on GPU Mangesh Nijasure, Sumanta Pattanaik Vineet Goel U. Central Florida, Orlando, FL ATI Research, Orlando, FL Abstract Our algorithm takes advantage of the capability of the GPU for computing accurate global illumination in 3D We present a system for computing plausible global illu- scenes and is fast enough so that interactive and immer- mination solution for dynamic environments in real time on sive applications with desired complexity and realism are programmable graphics processors (GPUs). We designed a possible. We simulate the transport of light in a synthetic progressive global illumination algorithm to simulate mul- environment by following the light emitted from the light tiple bounces of light on the surfaces of synthetic scenes. source(s) through its multiple bounces on the surfaces of the The entire algorithm runs on ATI’s Radeon 9800 using ver- scene. Light bouncing off the surfaces is captured by cube- tex and fragment shaders, and computes global illumination maps distributed uniformly over the volume of the scene. solution for reasonably complex scenes with moving objects Cube-maps are rendered using graphics hardware. Light is and moving lights in realtime. distributed from these cube-maps to the nearby surface po- sitions by using a simple trilinear interpolation scheme for Keywords: Global Illumination, Real Time Rendering, the computation of each subsequent bounce. Iterative com- Programmable Graphics Hardware. puting of a small number of bounces gives us a plausible approximation of global illumination for scenes involving 1 Introduction both moving objects and changing light sources in fractions of seconds. Traditionally, cube maps are used for hardware simula- Accurate lighting computation is one of the key elements tion of the reflection of the environment on shiny surfaces to realism in rendered images. -
Cascaded Voxel Cone-Tracing Shadows a Computational Performance Study
Bachelor of Science in Computer Science June 2019 Cascaded Voxel Cone-Tracing Shadows A Computational Performance Study Dan Sjödahl Faculty of Computing, Blekinge Institute of Technology, 371 79 Karlskrona, Sweden This thesis is submitted to the Faculty of Computing at Blekinge Institute of Technology in partial fulfilment of the requirements for the degree of Bachelor of Science in Computer Science. The thesis is equivalent to 10 weeks of full time studies. The authors declare that they are the sole authors of this thesis and that they have not used any sources other than those listed in the bibliography and identified as references. They further declare that they have not submitted this thesis at any other institution to obtain a degree. Contact Information: Author(s): Dan Sjödahl E-mail: [email protected] University advisors: Stefan Petersson DIDA Hans Tap DIDA Faculty of Computing Internet : www.bth.se Blekinge Institute of Technology Phone : +46 455 38 50 00 SE-371 79 Karlskrona, Sweden Fax : +46 455 38 50 57 ii ABSTRACT Background. Real-time shadows in 3D applications have for decades been implemented with a solution called Shadow Mapping or some variant of it. This is a solution that is easy to implement and has good computational performance, nevertheless it does suffer from some problems and limitations. But there are newer alternatives and one of them is based on a technique called Voxel Cone-Tracing. This can be combined with a technique called Cascading to create Cascaded Voxel Cone-Tracing Shadows (CVCTS). Objectives. To measure the computational performance of CVCTS to get better insight into it and provide data and findings to help developers make an informed decision if this technique is worth exploring. -
GLOBAL ILLUMINATION in GAMES What Is Global Illumination?
Nikolay Stefanov, PhD Ubisoft Massive GLOBAL ILLUMINATION IN GAMES What is global illumination? Interaction between light and surfaces Adds effects such as soft contact shadows and colour bleeding Can be brute-forced using path tracing, but is very slow Cornell98 Global illumination is simply the process by which light interacts with physical surfaces. Surfaces absorb, reflect or transmit light. This here is a picture of the famous Cornell box scene, which is a standard environment for testing out global illumination algorithms. The only light source in this image is at the top of the image. Global illumination adds soft shadows and colour between between the cubes and the walls. There is also natural darkening along the edges of the walls, floor and ceiling. One such algorithm is path tracing. A naive, brute force path trace essentially shoot millions and millions of rays or paths, recording every surface hit along the way. The algorithm stops tracing the path when the ray hits a light. As you can imagine, this takes ages to produce a noise-free image. Nonetheless, people have started using some variants of this algorithm for movie production (e.g. “Cloudy With a Chance of Meatballs”) What is global illumination? Scary looking equation! But can be done in 99 lines of C++ All of this makes for some scary looking maths, as illustrated here by the rendering equation from Kajiya. However that doesn’t mean that the *code* is necessarily complicated. GI in 99 lines of C++ Beason2010 Here is an image of Kevin Beason’s smallpt, which is 99 lines of C++ code.