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Assets/Particles/Explosion/ExplosionErosion_Shader.shader

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+Shader "Unlit/ExplosionErosion_Shader"
+{
+    Properties
+    {
+		_Tex("Texture", 2D)="white"{}
+		_Alpha("Alpha texture", 2D)="white"{}
+		_Smoke1("Smoke color 1", Color)=(1, 0, 0, 1)
+		_Smoke2("Smoke color 2", Color)=(0, 1, 0, 1)
+		[HDR]
+		_Fire("Fire color", Color)=(1, 1, 0, 1)
+		_AlphaProgress("Alpha progress", Range(0, 1)) = 0
+		_FireProgress("Fire progress", Range(0, 2)) = 0
+    }
+    SubShader
+    {
+        Tags { "RenderType"="Transparent" "Queue"="Transparent" }
+		Blend SrcAlpha OneMinusSrcAlpha
+		Zwrite Off
+        LOD 100
+
+        Pass
+        {
+            CGPROGRAM
+            #pragma vertex vert
+            #pragma fragment frag
+            // make fog work
+            #pragma multi_compile_fog
+
+            #include "UnityCG.cginc"
+			#include "Assets/Materials/myInclude.cginc"
+
+            struct appdata
+            {
+                float4 vertex : POSITION;
+                float4 uv : TEXCOORD0;
+				float4 color : COLOR;
+				float4 custom : TEXCOORD1;
+				
+            };
+
+            struct v2f
+            {
+                float2 uv : TEXCOORD0;
+                UNITY_FOG_COORDS(1)
+                float4 vertex : SV_POSITION;
+				float4 color : COLOR;
+				float age : TEXCOORD1;
+				float erode : TEXCOORD2;
+				float fire : TEXCOORD3;
+            };
+
+            sampler2D _Tex;
+            float4 _Tex_ST;
+			sampler2D _Alpha;
+			float4 _Alpha_ST;
+
+			float _FireProgress;
+			float _AlphaProgress;
+			float4 _Smoke1;
+			float4 _Smoke2;
+			float4 _Fire;
+
+			float fireWidth = .25f;
+
+            v2f vert (appdata v)
+            {
+                v2f o;
+                o.vertex = UnityObjectToClipPos(v.vertex);
+				o.uv = v.uv.xy;
+				o.color = v.color;
+				o.age = v.uv.z;
+				o.erode = v.custom.x;
+				o.fire = v.custom.y;
+                UNITY_TRANSFER_FOG(o,o.vertex);
+                return o;
+            }
+
+            fixed4 frag (v2f i) : SV_Target
+            {
+				_FireProgress = i.fire*2;
+
+				float4 tex = tex2D(_Tex, i.uv);
+
+				float4 baseColor = lerp(_Smoke1, _Smoke2, smoothstep(0, .5f, tex.r));
+				float4 fireColor = _Fire * max(_FireProgress/2, tex.g* valueStep(tex.g, 2, 1-pow(1-_FireProgress, 3)));
+
+				baseColor += fireColor;
+				
+				_AlphaProgress = i.erode;
+				float4 alpha = tex2D(_Alpha, i.uv);
+				alpha *= valueStep(tex.b, 2, _AlphaProgress);
+
+				return fixed4(baseColor.rgb, alpha.r);
+            }
+            ENDCG
+        }
+    }
+}