Kagamine Rin Chibi

MY BACK KILLSSS

I'm kinda proud of this except for the outline.. The outlines are all not straight at the tips of the hair. I can't figure out how to fix it ;A;
I did this on my Windows desktop computer because SAI's Pen Pressure doesn't work on mac.. WHYWHY??!?!?!!!? The screen is so high that I had to keep my neck up the whole time T.T

time: 4 hrs
program: PaintTool Sai
tools used: Wacom Bamboo Tablet Pen and Touch