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Essential Theoretical Graphics Papers

In Chronological order.

Bi-Directional Path Tracing

Eric P. Lafortune, Yves D. Willems, Compugraphics '93
Introduced bi-directional path tracing.

Optimally Combining Sampling Techniques for Monte Carlo Rendering

Eric Veach, Leonidas J. Guibas, SIGGRAPH 95 Proceedings (August 1995)
Paper on multiple importance sampling.

Metropolis Light Transport

Eric Veach, Leonidas J. Guibas, SIGGRAPH '97 Proceedings
Introduced metropolis light transport.

A Practical Analytic Model for Daylight

A. J. Preetham, Peter Shirley, Brian Smits, SIGGRAPH '99 Proceedings
A nice physically based spectral sky model that i'm using.

Other Graphics Links

Physically-Based Glare Effects for Digital Images
"The physical mechanisms and physiological causes of glare in human vision are reviewed. These mechanisms are scattering in the cornea, lens, and retina, and diffraction in the coherent cell structures on the outer radial areas of the lens. This scattering and diffraction are responsible for the 'bloom' and 'flare lines' seen around very bright objects. The diffraction effects cause the 'lenticular halo'..."

Practical and Robust Stenciled Shadow Volumes for Hardware-Accelerated Rendering
"We describe a robust, artifact-free technique for hardware-accelerated rendering of stenciled shadow volumes. Assuming existing hardware, we resolve the issues otherwise caused by shadow volume near and far plane clipping through a combination of (1) placing the conventional far clip plane .at infinity., (2) rasterization with infinite shadow volume polygons via homogeneous coordinates, and (3) adopting a zfail stencil-testing scheme"

Paul Debevec's home page
Lots of cool stuff from the master of HDR image based lighting.

The Cornell Box
Some info on the notorious 'Cornell box'

Monte Carlo Ray Tracing - Siggraph 2003 Course
Lots of tutorial type papers on Monte Carlo Ray Tracing. Very hardcore maths :P

Poynton's Gamma FAQ
Stuff about gamma you didn't know you didn't know :)

ompf.org
TBP's site which has a forum where you can discuss kd-tree building algorithms 24 hours a day if you're so inclined.

Igneus GI renderer
Interesting Dev blog about a photon-mapping ray tracer with some cool features.

OpenGL

OpenGL.org
Has a lot of OpenGL specs, plus some good forums

OpenGL Extension Registry
All the OpenGL extension txt files.

GameDev

#Flipcode: Official website of the #flipcode IRC channel, yay!
FlipCode: Game development news + resources. Defunct, still has some old articles up tho.
GameDev: Game development news + resources.
GamaSutra: Check the past articles.

New Zealand Game Developers Association

Penny Arcade: Funny.