World Tracking vs. Image Tracking


#1

Hello, do you know what was used in this AR experience? World Tracking or Image Tracking?

It seems that if it was image tracking, the bird could not travel away from the original image, losing sight of the image from the view of the phone. The museum podium seems like a narrow surface to launch World-tracking. I am hoping to launch a similar experience, but I am unsure which is best to use.