Another good example of how you can tell lighting/scene changes. The first half of the episode takes place during the day, the second half at night (the night sky in Equestria is rather purplish). The dark stripe in the middle is when Snips and Snails are bumbling into the Ursa’s cave. You can also see brownish stripes marking scenes that take place indoors in Twilight’s library.
I thought is was neat to see the progression of the episode based upon the color.
looking through the rest of the DA gallery, its interesting to see how much of the episodes are set at night