Once you have the track, you need the grid. The "RSS (Race Sim Studio) Formula Hybrid" series is the gold standard in Assetto Corsa. The community consistently releases updated physics packages that mimic the aerodynamic characteristics of the modern ground-effect cars seen in 2023.
For years, the go-to version of the track was a conversion from older F1 titles. While functional, these often lacked the bumps, the detailed road camber, and the lighting effects that define Singapore. assetto corsa singapore 2023