Initial alignment with image target

As I’ve also commented on this post I am now running into major issues with world tracking, which seems to lose track very easily…

Even in an ideal scenario with my tracker on the wall, printed on paper in a size that works great with regular image tracking, once I introduce SLAM tracking, the issues keep stacking up.

Since the target for the project will inevitably have to deal with some suboptimal conditions (screen glare, TV stands, or tables throwing off the track) I feel like I might not be able to finish the project…

Is there anything else I can try or is this simply an engine limitation?

Edit: The issues I described aren’t exclusive to either absolute or relative scale.