Hi Ryan,
generically the correct order would be (If you are using Loaders as sources of your image planes):
Loaders > image planes > Merge 3D > Renderer 3D > Saver
Your comp is a bit confuse: for example you connected the Saver output to the mask input of the room1 Loader which does not make sense.
It seems that you didn't yet learned the functions of the inputs and outputs of the nodes.
I suggest starting with a basic tutorial series, like this: