These 2 layouts and several of the props would not fit into the market zip and stay under the 25 meg "download purchase" limit of Renderosity. So in an effort to avoid CD and Shipping costs I have made them an add-on. The add-on contains the 2 layouts above in PZ3 format, 3 more textures, 9 more props and 1 more posable character prop. The walkways are the bulk of the new props saved as, sewer walk, no legs, with legs, with legs and rail, just the legs, just the rails and just the tred so you can mix and match or custom build with them. The portal window (it's also the sewer grate on the wall) is new, as is the archway. The fuseBox (beside the sewer tunnel door) is the posable character prop. The pull rings are linked to the door which is linked to the case. So pull on the ring and it will pull up, then pull the door open. It's also on the back wall of the hanger but kind of covered up by the arch. The portal window has a material group called "view" any square texture can be swapped with the one that is there now to change the view. In the case of the one on the sewer wall it uses the floor grate texture and trans on the "glass" with the glow mat behind it on the "view".