Complex sentence: Many of the performers undergo a metamorphosis indicated by often dramatic costume changes; for instance, the urbanites' outfits begin in dark, muted blues, reds, and greens and end in white, fairy-like outfits.
Split into simpler sentences: Many of the performers undergo a metamorphosis which is indicated by often dramatic costume changes. This is shown in the urbanites whose outfits begin in dark, muted blues, reds, and greens and end in white, fairy-like outfits.