I got a perfect score on the 1st section, OK score on the 2nd. All was going well on segment 3 but the answers quickly started become less accurate, which snowballed my results, apparently. My only guess is that the material was wrong for each part. The test specified the 1st part but did not specify any of the others. I did not want to assume a material so left them as the default. Was I supposed to change the material after downloading and recognizing features?