We are using Vuforia for a while and now experimenting possible solutions with Unity 3.5
Vuforia's detection and tracking algorithms work well when we use another rendering library but
with Unity extension its tracking algorthm doesn't work well. It detects image but when image gone it still renders 3d object.
I have added 2 images to describe my problem. First one is the object on the marker which what we want but when marker has gone Unity still renders 3d object.