I did too, I thought it would be a could concersation starter... People would see the blank shirt with just the text and purpose a question about it, and the answer could be revealed in the sun.
You definitly need some art on the shirt when it is in the shade.
The UV ink should enhance the design, not be integral to it's message.
When people see the shirt, 99% they will see either a blank shirt or a shirt with bones and a heart. Few will see the transition unless the wearer personally directs their attention to it.
The image of the bones and heart are nice, but more is needed.
About my design