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copied!<p>There are specific resources in Unity that will help with mobile development including resources, shaders, etc. that are specifically designed with mobile in mind. </p> <p>You certainly won't want to take 'unoptimized' PC-quality assets and drop them into a Unity project and export that for the iOS platform as you will ensure poor/unreliable performance. What you want to do is start building out a scene using assets of similar quality to those you want for your game and then seeing what the performance is on a real device. This will give you a feel for what level of performance you can expect from your game in production.</p> <p>Remember that the performance of a iPhone, iPad, iPad2, etc will vary wildly depending on what you're doing and which features you're touching. While Unity3D has been heavily optimized to deal with a variety of the scenarios, you can certainly do things like fogging which push the fill rate (a known limitation of the platform) and end up with horrendous performance.</p> <p>Could you possibly get more performance out of building your application purely in Objective-C? If you have the right skillset in engine development to design a specific implementation of technology for your specific requirements - Certainly. </p> <p>You just need to decide if you want to spend your time writing technology or building product. Most people who choose Unity do so because you get an exceptionally good engine which most people cannot beat the performance of (try building your own landscape engine), while at the same time getting exceptional time to market... and really its time to market that really matters in most cases.</p>

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