A plain T-shirt is read as casual comfort and being yourself without effort. A printed one in a dream points to the message or identity you want others to read at a glance.
Does the traditional reading fit your dream, or did it mean something else to you?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.