I know there may be a very simple answer, but I'm still kinda new at Blender's Game Engine and was wondering if I don't have something checked in the "addons" area that will enable the DOF check box on the side panel (Opens using the "N" key, to help with my description, lol). It's under the "shading" tab.
Like I said it may seem very simple, but I'm a NOOB, lol. So any help will be greatly accepted. Thanks :)