README

Path tracing ideas:

• https://raytracing.github.io/books/RayTracingInOneWeekend.html
• smallpt (100 line c implementation of path tracer)
• three path tracer
• http://blog.hvidtfeldts.net/index.php/2015/01/path-tracing-3d-fractals/
• Global Illumination and Path Tracing
• Path Tracing, by Steve Rotenberg