This would be a (hopefully) simple addition that could allow for one background to be utilized in a few different ways.
You'd just add a transparency layer of different filter colors over the background art to allow the home street backgrounds to appear in different tints. One could be for sunset, one for nightish, one for dawn etc. Perhaps one for grayish days.
This idea would be great if stringing together a neighborhood with some friends who wanted to utilize similar background art and music themes but have a sort of day progress as you walk from one street to the next.