Shader Example

//测试viewDir对顶点的影响
Shader "Example/TestViewDir" {
	Properties{
		_RimColor("Rim Color", Color) = (0.26,0.19,0.16,0.0)
		_RimPower("Rim Power", Range(0.5,8.0)) = 3.0
	}
	SubShader{
		Tags{ "RenderType" = "Opaque" }
		CGPROGRAM
		#pragma surface surf Lambert
			struct Input {
			float2 uv_MainTex;
			float2 uv_BumpMap;
			float3 viewDir;
		};
		sampler2D _MainTex;
		sampler2D _BumpMap;
		float4 _RimColor;
		float _RimPower;
		float _Test;
		void surf(Input IN, inout SurfaceOutput o) {
			half rim = 1 - saturate(dot(o.Normal,normalize(IN.viewDir)));
			float3 col = _RimColor.rgb * pow(rim, _RimPower);
			float4 c = float4(col, rim);
			o.Emission = c;
		}
		ENDCG
	}
	Fallback "Diffuse"
}

　　

结果：最终输出颜色*ColorMask后再与屏幕上颜色进行混合叠加

Shader "Example/ColorMask" {
	Properties{
		_Color("Texture to blend", Color) = (1,1,1,1)
	}
	SubShader{
		Tags{ "Queue" = "Transparent" }
		ColorMask B
		Pass{
			Blend SrcColor one
			CGPROGRAM
			#include "UnityCG.cginc"
			#pragma vertex vert
			#pragma fragment frag

			float4 _Color;
			float4 vert(appdata_base v) : POSITION
			{
				return mul(UNITY_MATRIX_MVP, v.vertex);
			}

			float4 frag(float4 pos:POSITION) : COLOR
			{
				return _Color;
			}
			ENDCG
		}
	}
	Fallback Off
}