No real secret the HRT feminization process adds curves and the Ftm transition adds angles.
I have been mentioning my trans man friend who just went through long awaited top surgery (well I understand!!!!) and how dramatically angular he is becoming.
The other day, I happened to find some ancient pictures of me which were actually proofs taken at one of those "specialty" photo places in a mall. The paper and proofs quite naturally were in less than stellar condition, but the one thing which did stand out to me was how angular my face was then.
Just another example of how you have to look behind you to see how far you have come!