I found these very helpful when writing my own path tracer: http://www.thepolygoners.com/tutorials/GIIntro/GIIntro.htm http://www.thepolygoners.com/tutorials/G

I found these very helpful when writing my own path tracer: http://www.thepolygoners.com/tutorials/GIIntro/GIIntro.htm http://www.thepolygoners.com/tutorials/GIIntro/GIIntro.htm http://www.iquilezles.org/www/articles/simplepathtracing/simplepathtracing.htm http://www.iquilezles.org/www/articles/simplepathtracing/sim...