Hey Call0ps 'baby pig' looks good but very weird. I really love your mark making on the charcoal portrait especially in the hair, and I love seeing the pastels and oils. I really do enjoy your updates.
at the moment the edges all seem a little lost because the brushes don't have much opacity, maybe try this brush, i've been using it lately, i believe it's originally maciej's from one of the imagineFX CDs, tweaked a bit.
it's a gradient brush that lets you control edges well depending on which direction you stroke in, split into 3 angle controls for different approaches; 1:less controlled marks, maciej' original; 2nd rotates more like a brush if you have an intuos 2 or later with tilt; 3rd i use mostly, easiest to control edges, i guess you'll see from experimenting.
don't know about the texture, usually a soft edged airbrush with a texture works for me for applying some in some crappy speedpaint, but i wouldn't feel right slapping some on on a zorn study, I'm sure there's a better way