T
An added thought to Paul's comment is what we call a "certified model." IOW, we stamp the model file exactly like a set of dwgs for const. This means I guarantee its accuracy and assume full responsibility for its representation as a virtual construction (as a lic arch). Risky, but a lot less risky than a RW bldg and usually blows away the opposing counsel (client/commissioners/arch.. because of the sequential representation of a detail or complex assembly. BTW also very well compensated by our clients.
SkUp has the power to be as detailed as any other 3D modeler, but much faster on its feet in a presentation when carefully org'd. Our model files regularly exceed 300mb and must be able to open and operate serendipitously from a laptop/projector in an open public forum (usually a tense place to stutter...)
Import is to make sure you have good tech, solid info, and doc ea step of the virtual const w/ a solid paper trail.
/D