Hi Ben, when you have time do look at the services pattern - I wrote this a while ago: xna-uk.net/blogs/braindump/archive/2009/08/23/… In your current project the downside of using a Static on the specific game object is that your drawables will always be 'tied' to this object in the future in order to get their camera - a service or passed standard interface will 'decouple' the drawables from any particular game object. To re-use them in the future they just need to be created in a new Game object that offers an object with this interface.

Hi Zolomon - I believe you should be able to apply this approach to 2D rectangles & circles instead of boxes and spheres, but I'm afraid I have currently implemented it in 3D only.