I speculate that the markings under the hull represent duterium fuel cell jettison hatches, and the antimattier pod jettison area (the deck plans have em relitivly close to that region). Problem is according to canon babble the antimatter pods were in the warp nacelles themselves. So really they could be anything. Reality is they just placed random details on with no clue what it was ment for. The shuttle bay for instance was never ment to be a shuttle bay until an episode came up where they needed one. fortunetly for the FX crew they modeled the aft area of the secondary hull the way they did, and added in the details of the bay door. if u note the early pilot episodes theres no detail on the shuttle bay area at all. Just a plain globe.
Anyways enough speculation, heres some shots of my secondary hull at 50% the deflector area, and top/bottom isnt textured yet. Once again i tried a cylindrical map that met with disasterous results (major texture stretching). so im going plainiar again :/ which means slicing the hull into 4 sections and making a texture for each section. but it still gets the results i want.
Im detailing it to look good close up, but i dont expect anyone to zoom in this close in game, Im guessing it will take 5 or 6 1024x1024 texture sheets to cover her.
Edit: After some disscussion with Lord Schtupp, and studying some studio pics, my attention has been brought back to the saucer. I may have to rebuild it after all. at least the superstructure area, may as well fix the lower saucer while im at it
To the one that mentioned that another set of blueprints exist. where can i get those prints? id like to compare them with the reference i got.