Because of some unique map needs I may have to render my own background tiles rather than let SpriteKit do it. In the java version we have our own custom update/render methods in which we draw everything to opengl.
However, SpriteKit doesn't seem to expose a render method, so I'm trying to determine the best game-loop method for our custom rendering to occur in. As far as I can tell, the update method is the only gameloop method SpriteKit exposes.