The easy part of this type rendering is no one can tell if you get it wrong, unlike a portrait or even still life of a bowl of fruit. The hard part is less obvious; it is difficult to render an image that has never been seen before so it must carry enough information to tell its own story. There is little room for sloppy pen work as it will detract from telling that story. Unlike abstract or stylized work in other mediums, pen and ink has a very strong line personality and must be either extremely loose, or extremely tight to carry off an idea image. Once you have decided what is being rendered, and chosen a loose or tight rendering style, it must be followed throughout without mixing styles. If done well, no one will notice any of this – they just see the idea and the image as art. Hopefully that is what is here.