Each tile has a different level of detail according to the zoom distance of the camera. So if you are farther away, the engine will show less stuff. That is an interesting feature.

But if I have a slow computer, I would like it to be possible to force the engine to use the tiles with less details even if my camera is close. The concept could be simple, there could be a combo box in the option menu that allows you to set what is the maximum detail level you want. If I select for example "far" it means that even if I am very close, the best it will draw is "Far".

It seems like something that could be implemented very easily considering that all the tiles have been configured for that.

Another thing, Some buildings seems to have far too much details even when they are at the minimum detail level. As a guide line, I would suggest that the "fartest" level should have at most 5 objects drawn.