I tried out painting again on linux (my only computer now is an ubuntu laptop after moving). Took me freaking forever to get the stupid tablet to work properly with the computer, I actually had to set up a couple udev rules and shell scripts to keybind the tablet buttons everytime it gets plugged in (for whatever reason, the Ubuntu Wacom tablet settings menu can't seem to set a keybind for just "ctrl" or "shift" and deactivate touch input).
Anyhow, here's the workflow of how I normally paint portraits... I don't use any fancy brushes, just Krita's pen and digital thingy you get from the right-click menu.
Scribble out a general outline -> draw a much cleaner set of lineart (still scribble-y) -> paint a bunch of colors underneath the lineart -> adjust colors to something I like -> add some basic lighting -> start painting on top of everything
Basically applied this to a new portrait-ish painting (I simply like doing them)- started out at 1280x800 (native Android tablet resolution, also downscales perfectly to Starsector's 640x400 interaction images) and worked from a couple references I got from google searching "ceremonial robes" and "female portrait photography".
VERY WIP (not even 33% done)
reference 1:
reference 2:
imgur album with screenshots taken at various points during the painting process to illustrate how I was doing things:
http://imgur.com/a/7aBnOHope this helps!