The US Congress passed copyright laws. Reality raises questions on edge cases. The courts clarify edge cases. In this case, the courts' clarification just ha

The US Congress passed copyright laws. Reality raises questions on edge cases. The courts clarify edge cases. In this case, the courts' clarification just happens to be on "What sort of artistic transformation is sufficient to qualify for that copyright exception?" This essentially clarifies that pasting (adding) something on top of a copyrighted work isn't sufficient. (Notably, there are other exclusions besides transformation that a work could also qualify for)