Downloading Unity 4.5 and the [Spare Texture sample project][1], It says it is unsupported on my Mac (running OSX Mavericks 10.9), and when I try to build to iOS it also says it is unsupported.
Is this functionality impossible on mobile phones (specifically iOS devices) due to hardware restrictions? Or do they need to support a specific version of OpenGL? What is the minimum or specific version of OpenGL that supports ARB_sparse_texture?
[1]: http://docs.unity3d.com/Manual/SparseTextures.html
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