Cardboard Model building
Cardboard Enterprise Corridors -pic
The transporter room is behind the red door. The only time I remember that door being used in TOS is during the fight scene between Decker and Mongomerey. Because this model was in the basement it absorbed a lot of moisture and started to warp everywhere, so I had to shoot what I needed to get done and then tear the whole thing down. It's a shame. These pics are all that is left of that huge model.