Thanks for the links....    I checked out UCS, looks promising.  

I will venture deeper in UCS  once I get the hang of my APP.... as it is, I'm already snowballed down designing and learning to code etc..  :) 

Mick

You might want to check out these threads, to see if it is close to what you want:

https://ar.qualcomm.at/content/unified-coordinate-system

http://forum.unity3d.com/threads/108256-Unified-Coordinate-System-for-String-and-QCAR

N

A simple scenario might be:

 if I create a 3D snake that is 5m long... & place target cards every 1m.

  Could  I then walk the length of the snake without the snake disappearing or breaking ?

I will give it a try & see what happens....  

I changed the "Max simultaneous Image Targets " to 4 ....

Mick 

Hi Mick

I think this should be possible if you increase the number of simultaneous targets to 2 or 3, because in each case they should provide you with a trackable, and hence a pose/matrix for each.  BTw The camera is always positioned at (0,0,0)

N