The Transforming Room [1.0.0] [Redstone]
This map is presented over the decision to build the hidden room. Here is a Redstone mechanism. With just one button You can toggle the appearance of the whole space. System management, of course, quite complex, but the developer believes that You should not have any problems with recreating the same design in Your own world. Also added video instructions, which will undoubtedly facilitate the task.