- Ray-tracing basic: http://web.cse.ohio-state.edu/~hwshen/681/Site/Slides_files/basic_algo.pdf
- http://www.cs.utah.edu/~shirley/books/fcg2/rt.pdf
- Ray-tracing example: http://people.mozilla.org/~sicking/webgl/ray.html
- http://www.flipcode.com/archives/Raytracing_Topics_Techniques-Part_1_Introduction.shtml
- GPU Ray-tracing: http://undernones.blogspot.com/2010/12/gpu-ray-tracing-with-glsl.html
- David J. EckGraphicsNotes 2013 Section 19: The Shader Language for WebGL
- GRAPHICS GEMS by ANDREW S. GLASSNER
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WebGL Beginner's Guide by Diego Cantor Brandon Jones
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WebGL Loader : https://github.com/frenchtoast747/webgl-obj-loader
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GPU Ray Tracing With GLSL: http://math.hws.edu/eck/cs424/notes2013/19_GLSL.html
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WebGL API: https://msdn.microsoft.com/en-us/library/ie/dn302341(v=vs.85).aspx