[eldog_]

As an addition, you can make any window translucent/transparent in X11 (running with a composite manager) using transset-df, e.g.,

  # Lets you click on a window and sets it's alpha to half
  $ transset-df 0.5

One usually gets annoyed with not being able to read their terminal properly after a while though.

[mintplant]

Yes, this is different from native terminal implementations in that it makes the entire window content transparent, including the text, vs just the background.