Just thought someone might like to see my flow chart for the basic render pipeline. I created this before I started working on the new engine. This is all implemented now and working well. As you may guess its a little more complex then whats shown here but you get the idea.
Added support for Retina displays and have done all tests, all scales work fine. Support for FBOs is in place and seems to work, I'll be running lots of tests first before I move on to the next TODO !
Overall things are progressing well.