hi Sneebol,
i'm not sure what you mean by "a whole city of tracks"- but if i got you right, you want to freely drive around in that city? if so, speed dreams is probably not the correct game for this
First, you should notice that the ac3d-file is only the
graphical representation of a track, while the physical part that is used by the game engine solely depends on the corresponding xml file.
In other words, you could use an xml-file of track A and an ac-file of another track B and mix it; the game engine would presumably start without an error, but the result would be really weird as you would see track b and drive track A at the same time...
Second thing is that a track in speed dreams must be a closed loop without any junctions or crossroads. There is some effort on using the same ac file with different xmls (for track variants), but afaik it is still wip, and even if this was finished, it would not work to "freely drive around", as you could only drive one track variant at a time (so maybe you could create a hundred xml files with different tracks through Köping, but you would have to decide what track to drive prior to starting a race). To be true, nothing else would make sense for racing
third thing is that real world
racing tracks are probably a better choice for a
racing game
i hope i did not disappoint you too much... but if you're still interested in making tracks (please!
), you should read the "20 minutes torcs track creation manual" to understand how tracks work in SD (same as in torcs). But attention! The title is very delusive; the truth is that it's hardly possible to create a nice track in less than some weeks (city or not)...
best regards