I've been trying to use model targets to track a guitar using a 3d model of a guitar I found online. I'm not sure if this particular 3d model would work but I don't have any 3d scanners lying around to make a 3d model of my guitar, so I used a model online that closely resembles my guitar. Is it possible to use a pre-existing 3d model that someone else created as my model target or do I have to create my own? When I use vuforia play mode to test, nothing appears over my guitar. I'll post a screenshot of my unity page to see if I'm doing something wrong. Chances are I am because I'm relatively new to vuforia and ar in general. Thanks a lot.