saving a complex 3d figure as a 3d matrix?

Hi folks - ignorant question that I hope has a simple answer. I am using Matlab to create a complex 3d figure, containing various mesh objects in a volume, that I need to visualize simultaneously. My 'scene' contains a mesh object build from a .obj file, and several Matlab mesh objects (at the moment, several spheres), for example. I want to know if there is a way to save the composite 3d figure that I am creating as a 3d format / 3d volume of data. In other words, I don't want to save the figure itself (that's easy enough), I want to save the data IN the figure, with the spatial relationships intact. Is there a way to do this?