Just thought of this...
I did this as an experiment before I found this thread. This is 100% white cotton fabric with an iron on transfer using a very old hex pattern. One picture has the flash on and the other does not. Hopefully, through my mistakes, everyone can see a few things. One, the iron on transfers come out rotten and stiff. Two, the white of the material does change in appearance due to the pattern and lighting.
I hope this is a helpful example.
I think our shirts are going to be the best around in every way!!!