Here is what I envision...

I would like to take a room in my house, and attach trellises to the entire surface of the 4 walls, held about 1 inch off the surface of the wall. I would then like to train ivy up the trellises. I want it to be thick enough that the trellises and walls are entirely obscured.

I would very much like to hear from someone who has done this, for a more in depth conversation.

I'm open to any changes in tactics or plants, as long as my vision of 4 solid walls of green is preserved.