Shader "Particles/Additive PMA" {
Properties {
	_TintColor("Tint Color", Color) = (0.5,0.5,0.5,0.5)
	_MainTex ("Particle Texture", 2D) = "white" {}
}

Category {
	Tags { "Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent" "PreviewType"="Plane" }
	Blend One One, Zero One														//Use this blend function for additive blended particles
	ColorMask RGBA																//Ensure the Alpha channel is included in the ColorMask
	Cull Off Lighting Off ZWrite Off

	SubShader {
		Pass {
			CGPROGRAM
			#pragma vertex vert
			#pragma fragment frag
			#pragma target 2.0
			#pragma multi_compile_fog

			#include "UnityCG.cginc"

			sampler2D _MainTex;
			fixed4 _TintColor;
			
			struct appdata_t {
				float4 vertex : POSITION;
				fixed4 color : COLOR;
				float2 texcoord : TEXCOORD0;
			};

			struct v2f {
				float4 vertex : SV_POSITION;
				fixed4 color : COLOR;
				float2 texcoord : TEXCOORD0;
				UNITY_FOG_COORDS(1)
				UNITY_VERTEX_OUTPUT_STEREO
			};

			float4 _MainTex_ST;
			
			v2f vert (appdata_t v)
			{
				v2f o;
				UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(o);
				o.vertex = UnityObjectToClipPos(v.vertex);
				o.color = v.color;
				o.texcoord = TRANSFORM_TEX(v.texcoord,_MainTex);
				UNITY_TRANSFER_FOG(o,o.vertex);
				return o;
			}

			sampler2D_float _CameraDepthTexture;
			float _InvFade;
			
			fixed4 frag (v2f i) : SV_Target
			{
				half4 col = 2.0 * i.color * _TintColor * tex2D(_MainTex, i.texcoord);
				col.rgb *= col.a;												//Prepare RGB for blend mode
				UNITY_APPLY_FOG_COLOR(i.fogCoord, col, fixed4(0,0,0,0));
				return col;
			}
			ENDCG 
		}
	} 
}
}
