Fix OpenGL invalidation breaking for weather effects, they start before

src/openrct2-ui/drawing/engines/opengl/OpenGLDrawingEngine.cpp

@@ -362,7 +362,7 @@ public:
     {
         WindowResetVisibilities();
 
-        if (ClimateIsRaining() || ClimateIsSnowing() || ClimateIsSnowingHeavily())
+        if (ClimateHasWeatherEffect())
         {
             WindowUpdateAllViewports();
             // OpenGL doesn't support restoring pixels, always redraw.

src/openrct2/world/Climate.cpp

@@ -288,6 +288,13 @@ bool WeatherIsDry(WeatherType weather)
     return weather == WeatherType::Sunny || weather == WeatherType::PartiallyCloudy || weather == WeatherType::Cloudy;
 }
 
+bool ClimateHasWeatherEffect()
+{
+    const auto& weatherCurrent = getGameState().weatherCurrent;
+    // The game starts drawing rain whenever this level is not none.
+    return weatherCurrent.level != WeatherLevel::None;
+}
+
 FilterPaletteID ClimateGetWeatherGloomPaletteId(const WeatherState& state)
 {
     auto paletteId = FilterPaletteID::PaletteNull;

src/openrct2/world/Climate.h

@@ -92,5 +92,6 @@ bool ClimateTransitioningToSnow();
 bool ClimateIsSnowing();
 bool ClimateIsSnowingHeavily();
 bool WeatherIsDry(WeatherType);
+bool ClimateHasWeatherEffect();
 FilterPaletteID ClimateGetWeatherGloomPaletteId(const WeatherState& state);
 uint32_t ClimateGetWeatherSpriteId(const WeatherType weatherType);