I released the marker base AR library.
This is NyARToolkitCS for Unity that is pure C# library.
You can try simple demonstration program.
If you interest, please try it.
I’m sorry when I do not understand your question.
I am not good English.
The NyARToolkitCS only calculates the coordinates of a marker transformation of the MarkerObject, all the objects placed under the MarkerObject can be displayed.
However, all the unit systems are expressed by mm.
For example, the ball of scale=80 will display an 80[mm] sphere.
Please set a favorite object to under the MarkerObject.