The DunBroch tartan pattern is physically impossible to make with traditional tartan weaving methods. Disney/Pixar has registered its pattern on the Scottish Register of Tartans, and gave the following information : It should be noted however that the tartan officially registered is somewhat different from the one in the movie, the latter being made of a very coarse fabric that doesn't have as much detail and color. Nevertheless, it matches the one John Lasseter, Mark Andrews and others wore for premieres of Brave.