Has anyone tried carpeting their home theater ceiling and/or walls? I was wondering what this would do, for sound and looks.

What got me thinking about this is this picture. It's the 4th picture down, orangish, and titled "The Golden Theater Era Memoirs". This ceiling probably isn't carpeted, but it gives an idea of what it would look like to put a dark carpet with a design in it on the ceiling. (Vacuuming could be a problem).

https://docs.google.com/spreadsheet/ccc?...amp;usp=sharing