"<unC0Rr> could also refuse to update textures when land changes if the tile isn't visible"
You had me at "refuse" <3
#include <QApplication>
#include "mainform.h"
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
MyWindow *mainWin = new MyWindow;
mainWin->show();
return app.exec();
}