On this design, I initially tried to get it to fill the whole space. I tried rotating and adjusting the view and the zoom. I toyed with the triangles and keep loosing that nice linear quality. Eventually I decided that the negative space may not be that bad.
Using negative space, or the space where there is not any actual design, can be kinda tricky. It can work really well by accentuating the actual design parts or it can backfire and distract the viewers attention and leave an image feeling unfinished and empty.