Under Hardware Settings she unlocked the game from the main thread. CPU affinity tweaks had helped on forums, but she left Advanced CPU Control alone—stability mattered more than a few percentage points. Instead she limited the Simulation View distance; seeing the whole island was lovely, but the CPU choked on simulation far beyond the city center. Reducing Simulation Range to Medium kept traffic calculations local and fluid.
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. This is one of the most taxing settings and often causes significant frame drops. Shadow Quality: . Shadows are extremely GPU-heavy in this game. Level of Detail (LOD): Under Hardware Settings she unlocked the game from