I am going through JS samples from Wikitude's repo on github and trying to modify them a bit. One thing that I could not figure out is "SnapToScreen" behavior when using InstantTracker (SLAM).
When I tried Unity3D samples, the InstantTracker (or rather Trackable) had option to disable "auto-hide on tracking lost". This is what I mean with "SnapToScreen".
SnapToScreen is currently not supported for the InstantTracker.
There is currently no way to control hiding/showing of augmentations when tracking is lost.
What is your use-case that requires this?