The phrase "art transformed into" implies a process of conversion, from one form of art to another. However, antonyms for this phrase include "art stagnating,""art remaining unchanged,""art lacking inspiration," and "art stuck in one medium."
By contrast, "art transforming out of" suggests a dynamic, evolving creative process, while "art blossoming into" implies growth and expansion. "Art breaking free from" can indicate a newfound freedom or boldness, while "art morphing with" suggests a blending of techniques or genres. And of course, "art vanishing into" could suggest a disappearance or end to the creative process altogether.