[Snarf]

Wings 3d is free (3d modeling), Gimp 2 (photoshop) is free also. If you have pictures of the interiors you can put the picture into wings 3d and start building all the bits to the picture, but it needs to be a direct view of what you want to build. I am building a useable in game Phalanx CIWS from scratch using said method. An interior will take a rediculous amount of time, but it certainly is doable. BTW you just have to start, immersion and youtube videos are the best way to learn this 3d software, once you start getting a feel for how the commands work it will start getting easier. The texture files are created with Wings 3d, then you add your patterns and colors to that file with Gimp. You will also need Silent 3ditor to import the model into a .dat file, and create your .sim .zon and .cam files.