1 face is only 1 side. So a simple cuboid on top of the 1G PSD
(Found in the EWL / NSL underground station) would have minimally
take 5 face. (1 big hole on the back lar)
Now, lets analyze a train with 2D cabin. For the most obvious
part, the first train car would have 6 faces.
Then, we got the doors. 4 doors * 2 = 8 doors, and this is only
one side only. Given that each door needs 2 sides, it has 16
faces.
The opposite doors = 16 faces * 2 = 32 faces.
Then we got dunno how many wheels. I suppose only front and back
faces, and multiply by 2 again for 2 different sides.
Then, there are the long seats, grab poles etc. Sometimes, some
of the cuboid are actually double face, just an example, the bottom
of a train cannot be having the same texture as the floor texture
in the car.
Now multiply it by 6 (Total 6 train cars) and you will get the
amount.
And why cant you just be content with 4FPS!?
I can be happy with 7-8fps, but when it comes to recording, I
think i might as well not upload..