Changing CAEAGLLayer colors of ios 6 Maps

Question

With the new Apple Maps, the MKMapTileView does no more work and i try to figure out how to manipulate the Layer (and its content) which is responsible for displaying the whole map. The View/Layer of interest is the VKMapCanvas layer, which is a CAEAGLLayer.

Is there any chance to subclass and overwrite/swizzle a method or implementation of this (VKMapCanvas)?