Physically Base Render : Equation playground

The online playground

Done:

• tweak roughness dielectric diffuse/alberdo specular
• Select equation term by term
• Select model and textures
• tweak color, light and gamma
• shader reload
• enable/disable textures (diffuse/roughness/metallic/hdrenv)

Todo:

• edit and see shader
• edit and see term with equation
• save & share materials using values from http://seblagarde.wordpress.com/2012/04/30/dontnod-specular-and-glossiness-chart/
• more lights
• IBL & area lights
• tiled/forward/deferred

Thanks

Alexandre Pestana for the idea, dx11 shader implementations of a pbr_viewer

Sources

The Book

• http://www.pbrt.org/ (+ related paper)

PBR Equation details

• http://graphicrants.blogspot.ca/2013/08/specular-brdf-reference.html
• http://simonstechblog.blogspot.fr/2011/12/microfacet-brdf.html

PBR Siggraph Courses

• http://blog.selfshadow.com/publications/s2013-shading-course/
• http://blog.selfshadow.com/publications/s2012-shading-course/
• http://renderwonk.com/publications/s2010-color-course/
• http://renderwonk.com/publications/s2010-shading-course/

PBR reading lists

• http://lousodrome.net/blog/light/2011/12/27/readings-on-physically-based-rendering/
• http://interplayoflight.wordpress.com/2013/12/30/readings-on-physically-based-rendering/

Related Blog posts on PBR & CG

• http://seblagarde.wordpress.com/2012/04/30/dontnod-specular-and-glossiness-chart/
• http://blog.selfshadow.com/2011/07/22/specular-showdown/
• http://renderwonk.com/blog/index.php/archive/distribution-based-brdfs/
• http://www.thetenthplanet.de/archives/255
• http://c0de517e.blogspot.fr/2013/12/notes-on-epics-area-lights.html
• http://mmikkelsen3d.blogspot.fr/2011/12/so-finally-no-tangents-bump-demo-is-up.html
• http://colinbarrebrisebois.com/category/reoriented-normal-mapping/
• http://aras-p.info/blog/2012/03/27/tiled-forward-shading-links/
• http://lousodrome.net/blog/light/2013/05/26/gamma-correct-and-hdr-rendering-in-a-32-bits-buffer/
• http://filmicgames.com/archives/581
• http://mycodefit.com/?p=52
• http://www.realtimerendering.com/blog/deferred-lighting-approaches
• http://pixelstoomany.wordpress.com/2008/07/05/another-day-another-hdr-rendering-trick-and-some-hope-for-the-future/
• http://gameangst.com/?p=441
• http://graphicsrunner.blogspot.co.uk/search/label/Dual-Paraboloid
• http://fgiesen.wordpress.com/category/graphics-pipeline/
• http://the-witness.net/news/2010/09/hemicube-rendering-and-integration/
• http://www.realtimerendering.com/index.html
• https://github.com/YuqinShao/Tile_Based_WebGL_DeferredShader
• http://codeflow.org/entries/2012/aug/25/webgl-deferred-irradiance-volumes/
• http://alteredqualia.com/xg/examples/deferred_tubelights.html
• http://diaryofagraphicsprogrammer.blogspot.fr/2013/09/call-for-new-post-processing-pipeline.html

Brdf Explorer

• [webgl](http://patapom.com/topics/WebGL/BRDF/ + same author wiki http://wiki.nuaj.net/index.php?title=BRDF)
• [disney] (http://www.disneyanimation.com/technology/brdf.html) + instructions
• bv

Papers list..

• Understanding the Masking-Shadowing Function in Microfacet-Based BRDFs -An Overview of BRDF Models
• Rational BRDF
• Distribution-based BRDFs
• Fast, Arbitrary BRDF Shading for Low-Frequency Lighting Using Spherical Harmonics -Accurate fitting of measured reflectances using a Shifted Gamma micro-facet distribution

Origins

• The scattering of electromagnetic waves from rough surfaces
• Models of Light Reflection for Computer Synthesized Pictures
• An Inexpensive BRDF Model for Physically-based Rendering
• Bidirectional Reflection Functions from Surface Bump Maps
• Geometrical considerations and nomenclature for reflectance
• Making shaders more physically plausible

open source research-oriented rendering system

• https://github.com/mmp/pbrt-v2 (from the book)
• https://www.mitsuba-renderer.org/