Does adding all the Manager improve the tracking ?

Hello.
Simple question here :
If I want to do a simple app "point the floor, tap it, instantiate a cube there".

1. Do I need a Plane Manager ?
2. Do I need the Point Cloud Manager ?
3. Do I need to place an anchor on the cube ?
4. Does the tracking is better if I add all 3 ?

Thank you.

 

I rewrite my question correctly :

Does adding a Point Cloud Manager help the tracking on other managers .

Exemple : I place a virtual cube on the real floor then I do a 360°; when looking at the cube it has drifted.
If I add a point cloud manager or a plane manager, or an anchor does it help ?

 

Adding managers do not apply. Adding anchors specific to your area of interest will help.

 

@todds_unity Thank you for your anwser.
I tried this :
1) Using Image Tracker to detect a real image
2) Instantiate a cube at the image position
3) adding an Anchor to this cube as a component

What I expected :
The cube position stick to the image position

What I got :
At the very moment I put the anchor, the cube offset itself by 5-10cm, then stick to this new place.

I think it is because it take the "nearest feature point" when I add the anchor instead of putting the anchor right where it is. Am I correct ?

 

The cube should stick to the image position based on your description.

Please file a bug.
https://unity3d.com/unity/qa/bug-reporting