There’s still some graphical lags but I think it’s from simulation (perhaps pathfinding)
Because if there’s less than 1000 pops from largest city, performance is not bad. and when population gets bigger and bigger, performance is worse and worse. Pops over 2000? almost skipping. lowering graphic option isn’t different from before and move camera to less populated area (edge of screen where city has only less than 1000 pops) almost same performance issue than before. when simulation is paused, there’s only few performance issue. everything is flawless and very fresh.
I have played Cities in motion 2 with much more population (over 100k) but there’s no such issue.
