I''m not sure if this is the correct place to post but I know that Trent had a lot of projects on his plate so I didn''t want to both him directly (the tutorials he did have been great though). Anyway a slight bug that I found while attempting a Java port of Lesson 3 of the game tutorial was: particle[loop].color[4]=particle[loop].alpha; on line 182 of ParticleSystem.cpp (in the Render function) which should be color[3] (as it is the fourth index). Not a big bug since it seems to work okay :D.