I have pale skin that's gotten more transparent as HRT makes it thinner. You can follow a vein from the side of my mouth, down my neck, to my chest, in certain lighting.
Because it's so transparent I have to be careful to drink enough water, eat at least somewhat cleanly, etc, or my skin gets horribly splotchy and red from underneath in a really ugly way. I actually had a friend ask me why the palms of my hands were red one day, she thought I burned them or something. Nope! That's just my blood showing through my skin because I'm dehydrated, thank you for asking :p
When I keep up on the water, diet, and sleep it looks completely different - still translucent, but more even and pale than chalky and reddish.
Pale witch girl For The Win. Drink water!