Clone trooper portrait line art

Another work in progress, I haven't gotten around to shading this in but i wanted to perfect the drawing first, so you can consider this a line drawing i guess...

Anyway, im gonna finnish this up portrait style, just use shading, dark shading maybe? in the background...keep the focus on the trooper in the centre, keep it simple, spent more time just on the outline here so i hope the more attention to detail has paid off!