how to align 3d models with objects in unity. I've positioned the model on the wto point but it still doesn't fit.
as in the following image:
the method you are using is already the right one. The object might not be very well suited for image based tracking, though. There is the possibility to use the 3D model of the object for tracking purposes as well (if the 3D model closely resembles the real object). You can join the beta program here: https://www.wikitude.com/3d-model-based-object-tracking/
Do you see a better alignment of the augmentation from different angles?