Yeah, thats what I would have guessed, but the model looks good.
The clouds were done in photoshop in 4 seconds.
This is not a completely accurate model of the wtc. Finding the exact dimension would be a bit hard. For the size just and do some research (wikipedia) on how tall and wide the building was. Then, in maya, create the model with the information known, converted of course (1 foot = 1 unit). Then, if the model is too big, scale it down.
Looks very good, but the sky material could look a little better
Where did you find the information needed to create the model including dimensions and steel sizes? Ive been looking to create a full model of the towers myself, but have been left wanting when it comes to finding the necessary information readily available.








