Iomedes created with astonishingly large Lego recreation of the Star Destroyer from the Star Wars animated series. The model is composed of 43,000 parts. It weighs 82 kg, and it's 2,44m long. It was build based on a design created by using Dassault-Systèmes' 3D CAD software CATIA V5. The computer rendering is shown in the video below. It took two weeks to compute using multiple machines.
Here is a 3D model of Erik Varszegi's LEGO "Venator-class Republic Star Destroyer."
I did this a year ago, using Dassault-Systèmes' 3D CAD software CATIA V5, basing myself on the pictures that where published on internet of the original physical model.
It contains a total of approximately 25 000 parts (I designed an internal architecture of the ship, but did not bother detailing it since it is not visible).
The video rendering was also performed with CATIA V5 : it took 2 weeks to compute using multiple machines...