I use my sister Liliy as a model all the time since I know her features inside out and I feel comfortable playing with them on canvas. I have a whole collection of her portraits since she was 6 years old. What's uncanny about drawing her is that the portrait always manages to look like my mother in the end instead of liliy. This one especially.
I have trouble convincing people that digital painting requires traditional painting skills. The next time I come across a person like that I will be sure to send them to your gallery to prove my point. Beautiful work!
You have the best style of drawing... like mentioned above you such a delicate softness in your work. And I don't just mean this piece, I mean all of your work. They are what I'd say are nothing short of truly amazing and often leave you breathless without words. This looks a lot like your sister too.
Great work!
you did a very good job