Hello, My name is Dimiter, but I'll go in these forums by the nickname of "malkia" My recent efforts were doing a terrain renderer for the iPhone/iPodTouch. Anyone else doing something like that? We can exchange ideas! I'm most interrested in speeding anything OpenGLES 1.1 related - how to optimize the draw calls, what formats to use, so no data conversion is avoided, is multi-threaded rendering doable (pushing data on one thread, preparing the next one to draw), efficient texture storage - PowerVR Compression, etc. Thanks!