Thanks. You were right, I wasn't running 3ds as administrator.
After I selected NVIDIA mental ray as the renderer and made the Sampling Mode and Skylight Mode manual adjustments I ended up with this preview:
It looks a little "grainy" to me, I don't know.
I'm also not sure about the illumination. Maybe the Gamma fix is necessary.
With that said, I'd like to make a proposition, if anyone is interested.
First, let me say that none of this is part of my profession (I'm a lawyer, actually), so all the knowledge involved is pretty useless for my regular life.
I see myself as a newfound hobbyist modeler.
When I started this, my plan was to create New York buildings (I can dream wit há recreation, right?) and, considering the significant work that is involved, I thought about concentrating on buildings that are big enough to stand out in the game, but also with simpler shapes.
After concluding the One New York Plaza, I planned to model buildings like the 111 Wall Street, 2 New York Plaza, 55 Water Street, One Penn Plaza, the XYZ buildings and others.
Bigger projects would be Citigroup Center, MetLife Building, the original WTC complex.
Pretty ambitious, I know, but this would be a long term hobby.
The problem is, I don't think I have enough time, right now, to learn all the nuances of the texturing part and deliver a high quality work.
Since I really liked the modelling part, maybe I should stick to it. I've been way more motivated to make new models than to texture and export this one to the game.
I don't want to sound lazy or anything, I'm just being honest.
So, if someone is interested in texturing this model and exporting it, I would be very grateful.
I don't know how this would work out. There is a "3ds models" category on the STEX. Maybe I could upload it there.