Difference between 3D & 2D recognition of 'Junaio'

This video clip is revealing how 'Junaio' tend to work better with 2D tracking image than 3D tracking model. The difference is that 2D tracking image has flat even surface for camera to recognize better (it also has less light and shadow interference than 3D) but 3D tracking model has uneven contour, which cause different shading effect by different light system and angle. This light and shadow interference on 3D model cause trouble for 'Junaio' to recognise its tracking model. (Surround condition such as light angle and shadow are changing once you move your 3D tracking model from its original place). For this case, I initially took a photo of 3D model in studio. It worked fine in studio but it doesn't work at my home. (Different light colour and angle between studio and home)