Thanks!
Please add these lines to your macau.ini file in assettocorsa\extension\config\tracks (these lines adds puddles and wet look for rainy weather)
[RAIN_FX]
PUDDLES_MATERIALS = road_asphalt_01b,road_asphalt_01_io,groove_1,road_asphalt_05,road_asphalt_04,road_asphalt_03b,road_surface_02,road_asphalt_06,road_asphalt_03,road_asphalt_02,road_asphalt_02b
SOAKING_MATERIALS = grass40$$$$,grass_2
SMOOTH_MATERIALS = pt_map_1,pt_map_4,pt_map_4,grdr01,logos01,NEW_ADS_01,grdr02,fence09,green,logo_race_hard,MARSHAL_PLATFORM_04,MARSHAL_PLATFORM_03,LOGO3,CRANE_1,fence_02_road,NEW_ADS_03,blkandyellowbarrier,AMBULANCEB,AMB_01,fix17_build_1,fix17_build_2,DISTANCEMARKER,sign_chevrolet,OVHD_SIGN_01,OVHD_SIGN_02,NEW_ADS_09,ROAD_SIGNS1,NEW_ADS_11,NEW_ADS_12,OVHD_SIGN_05,OVHD_SIGN_03,OVHD_SIGN_04,pitwalllogo,CANOPY
ROUGH_MATERIALS =
LINES_MATERIALS =
RELIEF_MATERIALS =