I know the regulars here will know this, but just for the sake of clarity and to avoid confusion for newcomers to digital lego, this is LDraw - the free fan-based alternative to LDD (the official Lego Digital Designer), although the LDD term is often misused to refer to either.
Quoting Chris Phipson
Although I've never been a huge fan of LDD stuff, this is quite impressive! ~ Chris.
Thanks Chris! Unfortunately I don't have 25000 bricks so digital lego is the only option. I have to say, I played with lots of real lego as a kid, and building large models now with the digital lego is every bit as much fun :)