Reduce rain streaks and drops to minimize PVR fillrate hit

Can improve performance by up to 10 FPS in areas when raining

README.md

@@ -28,12 +28,12 @@ You will also need the following tools installed
 
 ### Cloning the dca3-game repo and downloading the prebuilt elf
 - Open dreamsdk shell
-- type `git clone https://gitlab.com/skmp/dca3-game.git` (and press enter)
+- type `git clone --branch alpha https://gitlab.com/skmp/dca3-game.git` (and press enter)
 - It should take a moment and successfully clone the repo
 - type `cd dca3-game/dreamcast` (and press enter)
 - type `explorer .` (and press enter).
 - A folder named dreamcast with some files should be open. Keep it on the side.
-- Download the artifacts from https://gitlab.com/skmp/dca3-game/-/jobs/8725216645
+- Download the Alpha Prebuilt Elf from https://gitlab.com/skmp/dca3-game/-/releases
 - Open artifacts.zip and extract dca3.elf to the folder that was kept open before.
 - Close the folder and dreamsdk shell
 

src/renderer/Weather.cpp

@@ -301,7 +301,11 @@ void CWeather::AddRain()
 	float screen_width = SCREEN_WIDTH;
 	float screen_height = SCREEN_HEIGHT;
 	int cur_frame = (int)(3 * Rain) & 3;
+#if defined(DC_SH4)	
+	int num_drops = (int)(1 * Rain) + 2;
+#elif
 	int num_drops = (int)(2 * Rain) + 2;
+#endif
 	static int STATIC_RAIN_ANGLE = -45;
 	static int count = 1500;
 	static int add_angle = 1;

src/renderer/Weather.h

@@ -58,7 +58,7 @@ public:
 };
 
 enum {
-	NUM_RAIN_STREAKS = 35
+	NUM_RAIN_STREAKS = 10
 };
 
 struct tRainStreak