SHIPs are big, by definition. When your MOC gets to over one hundred studs you're naturally dealing with a build of decent scale. But in comparison with how big the vessel is supposed to be, for instance a colonist ship, they're tiny. So imparting a sense of scale is part of the challenge. This MOC by migalart shows how it's done. With a smart balance of panel and form to greebs, with implied structures and small details, and in this case with super effective use of stickers. The lighting and photo editing complete the illusion, and this thing looks absolutely colossal.