feat: Omnissiah fog

Assets/_Content/Models/VFX/Fog/Shaders.meta

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Assets/_Content/Models/VFX/Fog/Shaders/Fog.hlsl

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+#ifndef FOG_INCLUDED
+#define FOG_INCLUDED
+
+#include "Assets/_Content/Shaders/Include/Noises.hlsl"
+
+void Fog_float
+(
+    float4 ColorA,
+    float4 ColorB,
+    float3 PositionWS,
+    float3 PositionOS,
+    float3 PivotWS,
+    float3 Scale,
+    out float3 Output,
+    out float Alpha
+)
+{
+    // Test
+
+    //float test = ValueNoise3D(PositionWS, 40);
+    //float test = PerlinNoise3D(PositionWS, 40);
+    //float test = PerlinNoise3DLOD(PositionWS, 100, 3.5);
+    //float test = SimplexNoise3D(PositionWS, 40);
+    //float test = WorleyNoise3D(PositionWS, 40, 1);
+    //float id;
+    //float test = VoronoiNoise3D(PositionWS, 10, 1, .05, id);
+    //float test = FBMNoise3D(PositionWS, 10, 2, 2, .5);
+    //float test = RidgedNoise3D(PositionWS, 10, 2, 2, .5);
+    float3 camPos = _WorldSpaceCameraPos.xyz;
+    float depth = distance(camPos, PositionWS);
+    float depthAtten = smoothstep(10, 100, depth);
+    
+    float mask = smoothstep(0, lerp(.3, .1, depthAtten), PositionOS.y) * pow(smoothstep(1, .5, PositionOS.y), 2);
+    
+    float t = _Time.y * .7;
+    float s = lerp(Scale.x, 1, .3);
+    
+    float3 p = PositionWS;// - PivotWS;
+    p += float3(t, t * .2, t);
+    p += RidgedNoise3D(p - PivotWS * .9, .1, 3, 1.6, 1) * 3;
+    
+    float fog = FBMNoise3D((p - PivotWS * .5), 10 / s, 3, 1.5, .5);
+    
+    float4 col = lerp(ColorA, ColorB, saturate(RidgedNoise3D((p - PivotWS * .7) * float3(1, 1.6, 1), 3 / s, 3, 1.6, 1)));
+    
+    // Output
+
+    Output = col.rgb;
+    Alpha = lerp(fog, smoothstep(1, .5, PositionOS.y), depthAtten * mask) * lerp(.2, 1, smoothstep(0, 30, depth)) * mask * col.a;
+}
+
+#endif

Assets/_Content/Models/VFX/Fog/Shaders/Fog.hlsl.meta

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Assets/_Content/Models/VFX/Fog/Shaders/Fog.shadergraph.meta

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