I don't know about the other graphics. But terrain gets chopped off. At least that's my experience in trying to make new graphics.
EDIT: Here's an idea sparker: Stalingrad. The Germans are taking the suburbs. The city graphic is actually covering the 8 tiles which are still terrain. So use LM terrain to simulate the values suburbs would add to the city.
Yes, it does work perfect... as was said, units always show up 'on top' of the city graphic, so for some things this is good, such as city graphics with no massive skyscrapers or towers. For things that 'tower up into the air', it's not good, because the unit still appears on top; as if it is climbing up the building.
I suppose the graphic size is unlimited also (to certain extents at least), so landmark terrain features can be put into scenarios using a city on the very side of the screen or something, and using an absolutely huge graphic size. If you want the Grand Canyon somewhere, can be done. This should be very interesting to add some eye candy.
That could be a good idea too. I think that the cities will gain size mostly vertically, as the AOW ones. In other words the city will be built into a mount/hill. Perhaps in layers, so that the absolute heart of it can be fortified too.
Be careful with buildings that rise into the air though... as units never will go behind the city graphic, so towers, larger structures may look odd if placed in the spot where a unit will stand on top of it (even when 2 tiles back, etc).
Sorry guys, I'm feeling a little dense today; can someone state succinctly exactly what has been discovered here? I know it has something to do with the pcx size, but I'm unclear about how it actually works.....
Seems any size works fine... I extended the size to be huge, and the cities were huge.
All you have to do is an image resize of the city PCX to whatever you want. The larger area can be used to put whatever you want in there... Grand Canyon, the Moon, a whole city scene overlay, etc.
This is HUGE for scenarios... as long as the city can be seen (unshrouded, but can be in fog (doesn't need to be directly in sight by a unit), then you can use special cities on the edge of the map to put special terrain features where ever you want.
I made sure I did a resize with the appropriate scale of width to height staying the same.. not sure what happens if you change this.
Thanks goes to Varwnos! And you found it years ago???
Any Size will work because it is a Graphics Overlay. So for example the Height can be kept the same and the Width made much wider.
As for the area of Control, that remains the same so for example another CIV Unit could Run into what appears to be another CIVs Building or City and Not be Trespassing.
In other words, the Graphics can be changed to show as desired but the Game area for a City will remain Unchanged... so that should be taken under consideration or strange things will be observed in game