Painting is hard. Ever worked with Sai? You can achieve the same look with an "undo" feature for mistakes.
Have you seen the series Firefly? Clara really looks like Kaylee! Nonetheless, the final product was flawless
That's another series that I've haven't seen but I have been asked to do some fanart from there. I'll look into that. Thanks for your lovely comment
The WIP pictures you put up always put me more in mind of a sculptor then a painting.