Added fog on the main scene

Assets/AnimatedCosmos/Documentation/CosmosShader.md

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+# __Cosmos skybox shader documentation__
+
+__The package contains two shaders:__
+- Cosmos Animated (Skybox/Cosmos Animated)
+- Cosmos Animated Mesh (Unlit/Cosmos Animated Mesh)
+
+## __Cosmos Animated__ shader
+### Properties:
+- ***Color*** - tint color
+- ***Main Texture*** - Main skybox texture (Cubemap)
+- ***Colorize*** - saturation of skybox (0 is BW, 1 is Colorful)
+<br><br>
+- ***Animation*** - Enable animation of the skybox (turning off can increase the performance)
+<br><br>
+- ***Detail textures*** - Additive 2D detail textures
+- ***Intensity*** - Influence of texture (0 is no influence)
+- ***Scale*** - Scale of detail texture
+- ***Distortion*** - Distortion of detail texture
+- ***Speed*** - Animation speed
+
+## __Cosmos Animated Mesh__ shader
+### It is same as __Cosmos Animated__ shader but for meshes