I am planning to create my project using QCAR with lots of 3d and 2d stuff and I dont like unity 3d. i want to create solid base of the project with complete control in my hand which unity does not allow. It takes you into another world but I dont like to go away from xcode because i am only good in it. Now please suggest me 3d engine based on your valuable experiences. I am looking at isgl3d and cocos3d because they keep u in xcode with very solid wrappers over opengl. Does anybody have tutorial for integrating any of these engines with qcar? Any guidelines that how should I start? Any other engine which I should look at?