So I used to be able to track more than one image by setting the "max simultaneous tracked images" to more than one. However, I just update some photos for image trackers on Vuforia and downloaded the new package to unity and when I tried to play the game only one object could be tracked at the same time. The max simultaneous tracked images is definitely 2 and I know the camera can see both of them because when I hold them in the same position without the other image it's trackable. Any ideas on why I still can't track more than 1 image now?
Yes they are different images! In fact I was working in another project on the game and it worked, then when I pasted it into my new app which has a few other games, the tracking the two objects didn't work anymore :(