not op, but here are a few ive collected: https://web.archive.org/web/20130517222528/http://www.arcsynthesis.org/gltut/ https://web.archive.org/web/20130517222

not op, but here are a few ive collected: https://web.archive.org/web/20130517222528/http://www.arcsynthesis.org/gltut/ https://web.archive.org/web/20130517222528/http://www.arcsyn... https://news.ycombinator.com/item?id=26017086 https://news.ycombinator.com/item?id=26017086 https://news.ycombinator.com/item?id=18840859 https://news.ycombinator.com/item?id=18840859