iTerm2: Stopping the inactive pane from dimming

Question

I'm using irssi in one pane and nicklist.pl in the other, and whenever I'm in the irssi pane, the nicklist pane is dimmed:

How do I stop the inactive pane from dimming?

Answer 1

On newer versions of iTerm2 (Build 3.3.2+ for me), unchecking the following setting solved this:

Preferences(⌘,) -> Appearance -> Dimming

Then uncheck the first option:

"Dim inactive split panes"

Answer 2

Found it! There is a setting in Settings -> Appearance -> Dim inactive split panes. I would have quite liked to be able to set it for just the two profiles, but it doesn't matter that much.