I think it's the way the thing is implemented...
When using labels (for exemple here to add details to wings) i noticed that there is a very poor/unexisting antialiasing even if i use msaa x8 ...
comparing the edge of the wing to the white line you can see that the 3D shapes are way much smoother than the label...
this is unfortunate because labels are super usefull to add details while keeping the cpu load and the part count pretty low
@Fime indeed, they are not vectorial, they use texture atlases