Initial commit

Assets/ThirdpartyAssets/GradientSkybox/LinearTwoColorGradientSkybox.shader

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+Shader "GradientSkybox/Linear/Two Color" {
+	Properties {
+		_TopColor ("Top Color", Color) = (1, 0.3, 0.3, 0)
+		_BottomColor ("Bottom Color", Color) = (0.3, 0.3, 1, 0)
+		_Up ("Up", Vector) = (0, 1, 0)
+		_Exp ("Exp", Range(0, 16)) = 1
+	}
+	SubShader {
+		Tags {
+			"RenderType" = "Background"
+			"Queue" = "Background"
+			"PreviewType" = "Skybox"
+		}
+		Pass {
+			ZWrite Off
+			Cull Off
+
+			CGPROGRAM
+
+			#pragma vertex vert
+			#pragma fragment frag
+
+			fixed3 _TopColor, _BottomColor;
+			float3 _Up;
+			float _Exp;
+
+			struct appdata {
+				float4 vertex : POSITION;
+				float3 texcoord : TEXCOORD0;
+			};
+
+			struct v2f {
+				float4 vertex : SV_POSITION;
+				float3 texcoord : TEXCOORD0;
+			};
+
+			v2f vert (appdata v) {
+				v2f o;
+				o.vertex = UnityObjectToClipPos(v.vertex);
+				o.texcoord = v.texcoord;
+				return o;
+			}
+
+			fixed4 frag (v2f i) : SV_TARGET {
+				float3 texcoord = normalize(i.texcoord);
+				float3 up = normalize(_Up);
+				float d = dot(texcoord, up);
+				return fixed4(lerp(_BottomColor, _TopColor, sign(d) * pow(abs(d), _Exp) * 0.5 + 0.5), 1);
+			}
+
+			ENDCG
+		}
+	}
+	CustomEditor "GradientSkybox.LinearTwoColorGradientSkyboxGUI"
+}