New clouds shader

Assets/dbl-world/shaders/minecraft.meta

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Assets/dbl-world/shaders/minecraft/clouds.shader

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+/*
+ * Custom shader for Minecraft clouds
+ * Acts like "UnlitTwoTexture" from Source
+ * Fades with fog
+ */
+Shader "Custom/Minecraft/Clouds"
+{
+    Properties
+    {
+        _MainTex("Main Texture", 2D) = "white" {}
+        _MainTexScrollX("Main Texture Scroll X", Float) = 0.001
+        _MainTexScrollY("Main Texture Scroll Y", Float) = 0.001
+
+        _NoiseTex("Noise Texture", 2D) = "white" {}
+        _NoiseTexScrollX("Noise Texture Scroll X", Float) = 0.001
+        _NoiseTexScrollY("Noise Texture Scroll Y", Float) = 0.001
+
+        _Color("Tint Color", Color) = (0.37, 0.37, 0.37, 1.0)
+    }
+
+    SubShader
+    {
+        Tags { "RenderType"="Opaque" }
+        Blend One One  // Additive blending
+        ZWrite Off
+        Cull Off
+
+        Pass
+        {
+            CGPROGRAM
+            #pragma vertex vert
+            #pragma fragment frag
+            #pragma multi_compile_fog
+
+            #include "UnityCG.cginc"
+
+            struct appdata
+            {
+                float4 vertex : POSITION;
+                float2 uv : TEXCOORD0;
+            };
+
+            struct v2f
+            {
+                float2 uv1 : TEXCOORD0;
+                float2 uv2 : TEXCOORD1;
+                float4 vertex : SV_POSITION;
+                float3 viewPos : TEXCOORD2;
+            };
+
+            sampler2D _MainTex;
+            float4 _MainTex_ST;
+            half _MainTexScrollX;
+            half _MainTexScrollY;
+
+            sampler2D _NoiseTex;
+            float4 _NoiseTex_ST;
+            half _NoiseTexScrollX;
+            half _NoiseTexScrollY;
+
+            float4 _Color;
+
+            // Fog globals
+            uniform float unity_FogStart;
+            uniform float unity_FogEnd;
+            uniform float unity_FogDensity;
+
+            v2f vert (appdata v)
+            {
+                v2f o;
+                float4 worldPos = mul(unity_ObjectToWorld, v.vertex);
+                float4 viewPos = mul(UNITY_MATRIX_V, worldPos);
+                o.viewPos = viewPos.xyz;
+                o.vertex = UnityObjectToClipPos(v.vertex);
+                
+                // Textures scrolling
+                o.uv1 = TRANSFORM_TEX(v.uv, _MainTex) + float2(_MainTexScrollX, _MainTexScrollY) * _Time.y;
+                o.uv2 = TRANSFORM_TEX(v.uv, _NoiseTex) + float2(_NoiseTexScrollX, _NoiseTexScrollY) * _Time.y;
+
+                return o;
+            }
+
+            fixed4 frag (v2f i) : SV_Target
+            {
+                fixed4 tex1 = tex2D(_MainTex, i.uv1);
+                fixed4 tex2 = tex2D(_NoiseTex, i.uv2);
+                fixed4 col = tex1 * tex2 * _Color;
+
+                // Calculate fog factor
+                float depth = abs(i.viewPos.z);
+                float fogFactor = 1.0;
+                #if defined(FOG_LINEAR)
+                    fogFactor = saturate((unity_FogEnd - depth) / (unity_FogEnd - unity_FogStart));
+                #elif defined(FOG_EXP)
+                    fogFactor = exp2(-unity_FogDensity * depth);
+                #elif defined(FOG_EXP2)
+                    fogFactor = exp2(-unity_FogDensity * unity_FogDensity * depth * depth);
+                #endif
+
+                // col.rgb = lerp(fixed4(0,0,0,0).rgb, col.rgb, fogFactor);
+                
+                col.rgb *= fogFactor; // Fade to black
+
+                return col;
+            }
+
+            ENDCG
+        }
+    }
+
+    FallBack "Particles/Standard Unlit"
+}

Assets/dbl-world/shaders/minecraft/clouds.shader.meta

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