One way is to render (3d to 2d is the definition of rendering) the model. Not as part of a scene, just the model, w/ a mask. Later, make a 2d plane and use the previously rendered image as a texture (along w/ the mask, if needed, for transparency on the plane).

I've done this many times with trees and background images/scene elements. If you plan it out, you can even get the lighting to match up, and the transparent plane will throw swadows of a sort too.

Friends don't let friends use booleans.