Avoid markup's control point interaction with model

Hi,

I have 2 models on the scene, one is near and one is far from the camera, the nearModel is occluding part of the farModel. I also have a markupsPointList. I want my markup points to “not see” the nearModel while I move a point over the nearModel (and the farModel) so the point ends up exactly over the farModel, is there a way to achieve that? Another solution, although less preferable, would be if I could make my markup points always snap to the farModel, would that be possible?

Thank you