Never went into art school, no. Just years of practice, development with the aid of the internet. Which can be an school if well leveraged.
Interesting, I know there's some art resources about but most I have seen had to do with traditional paint-type drawings or portfolios.
I'm curious to know how many years to get proficient at this point? I use to draw alot but it's been 6 years last time I picked up a pen/mouse.