The first thing I do when I create a large dungeon (or cave) map with detailed rooms is to create an overall map with all the rooms displayed on it as a guide. The overall map I am using as a guide for the first 3D map is shown below:

The overall map is originally created as a 2D map but will later be converted to a small 3D overall map (but without details) to use with the final product. I have decided I want to keep this first 3D map small, so it is only going to have a total of seven rooms. It will be possible to go to any large, detailed version of an individual room by simply clicking on it on the overall map.

More updates to come.