You might want to consider adding more hairs to increase realism, if that is feasable (I don't actually have P5 or Max, but I'm interested in the whole dynamic hair idea). I haven't looked closely at others (I'm going to be staring weirdly at everybody's scalps now, thanks a LOT :-) and maybe it varies from person to person, but when I look at my own in the mirror, the hairs are noticeably closer together (and that's at the top where I'm starting to go bald!). I can see my scalp through most of them much like the renders above there, but along the sides the scalp is only visible on the very edge.