The reason for this is because hook5 basic doesn't allow you to use the hook menu which allows you to place lights etc, and the cubemap (just think about this as the environment light source for now) is commented out in the 'default room settings', but not commented out in the 'customzier room settings'. open 'main11.fx' and update the path for the default room and the customizer room. Extract 'ActiveMod' folder from 'StarterContent.zip' to 'Mod' folder. Extract updated hook files from 'hook5basicversion.zip' to 'Binaries' folder.