Thanks for that snippet - very generous of you.

Annoyingly, as far as I can see I'm doing everything 'right'. I'm having issues getting the openGL performance tool to work at the moment, which makes life harder (but that's another thread entirely).

I think there's something fundamental which I'm missing somewhere. Something to do with the format of my texture atlas, or the way I've used the EAGLview as the basis of my engine, or... something. Just not seeing it yet.