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Topic: Global illumination

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	Global illumination - Wikipedia, the free encyclopedia
		Global illumination algorithms used in 3D computer graphics are those which, when determining the light falling on a surface, take into account not only the light which has taken a path directly from a light source (direct illumination), but also light which has undergone reflection from other surfaces in the world (indirect illumination).
		These algorithms model diffuse inter-reflection which is a very important part of global illumination, however most of these (excluding radiosity) also model specular inter-reflection too which makes them more accurate algorithms to solve the lighting equation and provide a more realistic globally illuminated scene.
		In real-time 3D graphics, global illumination is sometimes approximated by an "ambient" term in the lighting equation.
	en.wikipedia.org /wiki/Global_illumination (386 words)

	Global illumination (Site not responding. Last check: 2007-11-04)
		Global illumination refers to a class of algorithms used in 3D computer graphics which, when determining the light falling on a surface, takes into account not only the light which has taken a path directly from a light source (local illumination), but also light which has undergone reflection from other surfaces in the world.
		Global Illumination Compendium by Philip Dutré A compendium containing most of the useful formulas and equations for global illumination algorithms.
		Validation Proposal for Global Illumination and Rendering Techniques Study and reproduction of a complex environment using global illumination rendering techniques and BRDF sampled materials.
	www.serebella.com /encyclopedia/article-Global_illumination.html (585 words)

	Global Illumination and All That (Site not responding. Last check: 2007-11-04)
		Global illumination effects include the soft darkening under an object and near edges, color bleeding, etc. These effects are subtle, but important for the realism of an image.
		Simulation of global illumination has often been dismissed as being too inflexible and too slow for use in the effects industry.
		Another objection has been that global illumination algorithms have not been able to handle the insanely complex scenes that are routinely rendered in the industry.
	www.seanet.com /~myandper/abstract/sig03c09.htm (420 words)

	Globalization @ Globalists.com (Site not responding. Last check: 2007-11-04)
		Some maintain that globalization is an imagined geography; that is, a political tool of ruling neo-liberlists, who are attempting to use certain images and discourses of world politics to justify their political agendas.
		A consequence of economic globalization is increasing relations among members of an industry in different parts of the world (globalization of an industry), with a corresponding erosion of national sovereignty in the economic sphere.
		Globalization (or globalisation) is a social change, an increased connectivity among societies and their elements due to transculturation; the explosive evolution of transport and communication technologies to facilitate international cultural and economic exchange.
	www.globalists.com (5622 words)

	Global Illumination
		Intensity is the option that controls how intense your Global Illumination effect is. The higher the number the brighter the effect will be.
		The Global Illumination effects are set up in your scene, but they have not been tuned enough to yield good results.
		Global Illumination alone can be used to produce good quality images.
	www.edharriss.com /tutorial_GI/xsi_global.htm (1484 words)

	Global Illumination Images by Henrik Wann Jensen
		Global illumination is a superset of radiosity and ray tracing.
		This image of the full moon as seen through a thin layer of clouds was rendered using the techniques from a paper describing a physically-based night sky model.
		The global illumination version took 12 seconds to render and 3 seconds of photon tracing time.
	graphics.stanford.edu /~henrik/images/global.html (823 words)

	9 Using Procedural Shaders with Global Illumination Algorithms
		As global illumination techniques are on the edge of being used in commercial applications, it is getting more and more important to find ways of suitably representing the physical properties of a scene description including the reflectance properties of surfaces and the energy distribution of light sources.
		This construct is similar to a while loop in C. The arguments of the illuminance statement specify the directions from which the shader wants to receive illumination, in the form of a cone (axis and angle) at the shaded point.
		Under the assumption that the computations of the shader are linear in the incoming illumination (as they should be, since the radiance equation is linear), the bidirectional reflectance is determined from the outgoing radiance returned by the shader.
	graphics.cs.uni-sb.de /~slusallek/Doc/html/node14.html (4306 words)

	Global Illumination using Photon Maps, Henrik Wann Jensen (Site not responding. Last check: 2007-11-04)
		This paper presents a two pass global illumination method based on the concept of photon maps.
		Noise and blur at discontinuities in the radiance estimate is reduced by using a cone filter.
		The results presented demonstrate global illumination in scenes containing procedural objects and surfaces with diffuse and glossy reflection models.
	graphics.ucsd.edu /~henrik/papers/ewr7 (359 words)

	eScience Lectures Notes : Global Illumination models
		The appropriate local illumination model is applied at each level and the resultant intensity is passed up through the tree, until the primary ray is reached.
		The origin of the shadow ray is the intersection point and the direction vector is the normalized vector between the intersection point and the position of the light source.
		The sculpture is illuminated by light entering a window behind the sculpture, so light reaching the viewer first reflects off the colored surfaces, then off the white surfaces before entering the eye.
	escience.anu.edu.au /lecture/cg/GlobalIllumination/printCG.en.html (3910 words)

	Ray Tracing News, Volume 13, Number 1
		They range from the fairly simple (direct illumination without occluders) to the fairly challenging (reflection of a caustic from a secondary luminaire).
		This section is a collection of notices of some recent papers related to ray tracing and global illumination.
		The radiosity method is a physically based method to compute the illumination in a virtual environment with diffuse (matte) surfaces.
	web.umr.edu /~johns/raytracer/rtn/rtnv13n1.html (6813 words)

	Global Illumination Test Scenes (Site not responding. Last check: 2007-11-04)
		The global illumination community has discussed having a database of scenes that could be used to compare and validate different global illumination algorithms.
		We present a set of test scenes for global illumination algorithms and propose that they be the beginning of such a database.
		These scenes are designed to be as simple as possible and still test a particular aspect of energy transport.
	www.cs.utah.edu /~bes/papers/scenes (142 words)

	Technorati Tag: Global illumination (Site not responding. Last check: 2007-11-04)
		Too expensive to use on Spider-Man, global illumination has advanced so much in a few years that Sony Pictures Imageworks found it a viable solution...
		Global illumination Interiors: V-ray Lighting Techniques - Continuing from his first DVD, Global Illumination: Exteriors, Christopher Nichols explains...
		Online Coupons for Illuminations Coupon Chief has free coupons for you to use for discounts on your online purchases at Illuminations.
	www.technorati.com /tag/Global+illumination (511 words)

	Interactive Global Illumination (Site not responding. Last check: 2007-11-04)
		We present a method for interactive global illumination computation which is embedded in the framework of
		illumination by tracing photons selectively to the scene regions that require illumination update.
		criteria whose goal is to minimize the perceivability of outdated illumination.
	www.mpi-sb.mpg.de /resources/anim/spt (176 words)

	in Global Illumination * (ResearchIndex) (Site not responding. Last check: 2007-11-04)
		Abstract: These notes introduce the basic concepts of integral equations and their application in global illumination.
		Much of the discussion is expressed in the language of linear operators to simplify the notation and to emphasize the algebraic properties of the integral equations.
		We start by reviewing some facts about linear operators and examining some of the operators that occur in global illumination.
	citeseer.ist.psu.edu /516850.html (649 words)

	Global Illumination Compendium -- The Guide to Global Illumination Algorithms
		The publishing of the book Advanced Global Illumination has taken most of my time during the past 18 months, so that's why the Compendium was not updated as frequently as it should.
		I first distributed early versions of this document in 1999 when I was a post-doc at the Program of Computer Graphics at Cornell University.
		This collection of formulas and equations is supposed to be useful for anyone who is active in the field of global illumination in computer graphics.
	www.cs.kuleuven.ac.be /~phil/GI (352 words)

	Inverse Global Illumination - SIGGRAPH 99
		The method's input is a geometric model of the scene and a set of calibrated high dynamic range photographs taken with known direct illumination.
		The algorithm hierarchically partitions the scene into a polygonal mesh, and uses image-based rendering to construct estimates of both the radiance and irradiance of each patch from the photographic data.
		Re-renderings are produced using a global illumination system under both original and novel lighting, and with the addition of synthetic objects.
	athens.ict.usc.edu /Research/IGI (613 words)

	Global Illumination (Site not responding. Last check: 2007-11-04)
		Global illumination is a method of lighting a 3-D scene by the use of light-emitting scene elements rather than traditional lights.
		This is mapped to a sphere which encloses your scene and camera.
		Rendering with radiosity yields the following...which is illuminated only by the glowing part of the sohere
	oscar.pharmacy.arizona.edu /global_illum.html (136 words)

	Conference \| SIGGRAPH 2004
		A new method that computes indirect illumination by approximating the energy from distant surfaces and nearby surfaces separately.
		An unbiased Monte Carlo scheme for incorporating an image-based light source into a global illumination renderer.
		Lucifer is a global illumination environment capable of handling inhomogeneous, participating media while taking into account multiple inelastic scattering.
	www.siggraph.org /s2004/conference/sketches/sketches19.php?=conference (81 words)

	A K Peters, Ltd. - Advanced Global Illumination
		This book provides the reader with a fundamental understanding of global illumination algorithms.
		It discusses a broad class of algorithms for realistic image synthesis and introduces a theoretical basis for the algorithms presented.
		If you want to design and implement a global illumination rendering system or need to use and modify an existing system for your specific purpose, this book will give you the tools and the understanding to do so.
	www.akpeters.com /product.asp?ProdCode=1772 (163 words)

	Illumination - IESNA - The Lighting Authority
		The breakdown of the illuminations by time-frame and schools is represented in the figures below.
		This one fixes some of the flicker problems, Illumination has been added to Delphree as an open source project.
		The IESNA is the authority on the lighting industry in the USA, Canada and Mexico and one of the forerunners in the control of this form of pollution.
	illumination.surferfind.com (140 words)

	Industrial-Strength Global Illumination (Site not responding. Last check: 2007-11-04)
		We then proceed with some examples of photosurrealistic global illumination, ie.
		We also give an overview of a new method to compute global illumination in very complex scenes.
		Finally, we describe how to "bake" and reuse global illumination results for faster rendering.
	www.seanet.com /~myandper/abstract/sig03c27.htm (129 words)

	Amazon.co.uk: Advanced Global Illumination: Books (Site not responding. Last check: 2007-11-04)
		The text covers the theory of Monte Carlo techniques and explains how these concepts are used in global illumination algorithms.
		Hints and tips on how to transform the theoretical concepts into actual software code are a significant feature of this text; the appendix describes how to design a global illumination system using the building blocks outlined in the book.
		It will appeal to all who are interested in implementing and designing a global illumination rendering system.
	www.amazon.co.uk /exec/obidos/ASIN/1568811772 (433 words)

	Realistic Image Synthesis Using Photon Mapping
		Photon mapping, an extension of ray tracing, makes it possible to efficiently simulate global illumination in complex scenes.
		Photon mapping can simulate caustics (focused light, like shimmering waves at the bottom of a swimming pool), diffuse inter-reflections (e.g., the "bleeding" of colored light from a red wall onto a white floor, giving the floor a reddish tint), and participating media (such as clouds or smoke).
		This book is a practical guide to photon mapping; it provides both the theory and the practical insight necessary to implement photon mapping and simulate all types of direct and indirect illumination efficiently.
	graphics.ucsd.edu /~henrik/papers/book (132 words)

	Global Illumination: Interiors
		Continuing from his first DVD, Global Illumination: Exteriors, Christopher Nichols explains how interior global illumination differs from exterior GI.
		Christopher focuses on the concept of digital sets and explores issues of interior lighting for GI, including the variety of light sources that can be used, as well as how space plays an important role in lighting.
		With Global Illumination: Interiors, you will see the rendering of an interior space in a whole new light.
	www.thegnomonworkshop.com /dvds/cni02.html (314 words)

	PLUGINS PAGE
		Global Illumination is a technique to render a scene so that all objects receive a light from every angle.
		With PlaceOnPoints you can simulate global illumination thanks to the nature of PlaceOnPoints.
		This shows you how flexible simulating Global Illumination is with PlaceOnPoints.
	www.geearea.pwp.blueyonder.co.uk /Tutorials/GI.htm (616 words)

	Global Illumination (Site not responding. Last check: 2007-11-04)
		Select the Overview link above in order to gain a general understanding of the operations and requirements for the Global Illumination World depicted below.
		Select the Definitions link above in order to gain a general knowledge of the terms used in manipulating the Global Illumination World depicted below.
		Click on any of the Light Switches or Objects in the Global Illumination World below to display a set of menus used to select or change any of the parameters associated with that light source, or object.
	www.cs.rit.edu /~icss571/lightingwrl/global.htm (85 words)

	Reclamation: Technology
		Support for a large array of hardware ranging from NVIDIA's GeForce 256 to FX and ATI's Radeon 7500 to Radeon 9800 class hardware.
		Groundbreaking global illumination driven per-pixel lighting with support for normal, specular and refraction mapping.
		Parametric surfaces (Quadratic Béziers, Non Uniform Rational B-Splines and more) allowing for true curved surfaces with infinite levels of detail and accurate fabric simulation.
	www.reclamationgame.com /technology.0.html (413 words)

	[No title] (Site not responding. Last check: 2007-11-04)
		After a fast render with "Tune Photons" checked, we get a direct visialization of the photon map.
		This is an aproximation of the global lighting in the scene.
		If you get a result like this; it is good enough as a photon map for pathlight, you don't need to tweak it anymore.
	www.blender.org /docs/2.32_release/gituto (1309 words)

	Faking Global Illumination in Houdini: Globaltk
		Here is a quick and easy way to get fairly nice global illumination style lighting using Vmantra and Houdini.
		Here are some other sites that can provide a good introduction to the theory and techniques of global illumination:
		Also has a Houdini plug-in to allow you to create global lighting set-up from an HDR image.
	www.lewkiw.com /html/global.html (1350 words)

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