"and I like how I see they're all reaching or calling out for god, and all so expressive and close to one another.... but there isnt' any sense of interaction."
That was actually intentional. The band really really wanted a biblical vibe, so I looked at a lot of Gustave Dore' woodcuts (specifically from his Dante's inferno stuff) and observed how everyone is always writhing in their own personal hells and rarely looking at each other or interacting other than maybe to trip over someone, haha.
"just because curiosity is hitting my head,
how do you work for yout lining? for humwawa for instance, did you draw it on paper then scan it or is pure digital.
its just so clean."
I draw directly in Photoshop with a tablet and the brush I use is just fairly hard edged....so that's why it comes off so hard-lined like that. I do occasionally draw on paper while sitting on the couch or if I happen to bring my sketchbook with me, but most of the time they just remain sketches. If i am doing a serious painting, I almost always draw right inside Photoshop because it eliminates the scanning step and I can edit my lines more comfortably (i.e. scaling, history, rotation, etc).
Should have an update on Humawa in a few days....I've been sick and motivation to paint has been sparse. 
-D