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綠板過濾，將視頻的某顏色過濾成透明，甚至你們可以以該代碼為前提去實現(xiàn)各種顏色方面的效果實現(xiàn)。

Shader "MyShader/FilterfColor" {     Properties {         _MainTex ("Base (RGB)", 2D) = "white" {}         _FilterfColor("Ridof (RGB)",Color)=(1,1,1,1)     }     SubShader {         Tags { "RenderType"="Opaque" }         Blend SrcAlpha OneMinusSrcAlpha         pass         {             CGPROGRAM             #pragma vertex vertext_convert            #pragma fragment fragment_convert            #include "UnityCG.cginc"             sampler2D  _MainTex;             sampler2D  _MainTex1;             float4  _FilterfColor;             struct Inputvrite             {                 float4 vertex : POSITION;                 float4 texcoord : TEXCOORD0;             };             struct Inputfragment             {                 float4 pos : SV_POSITION;                 float4 uv : TEXCOORD0;             };             float ColorLerp(float3 tmp_nowcolor,float3 tmp_FilterfColor)             {                 float3 dis = float3(abs(tmp_nowcolor.x - tmp_FilterfColor.x),abs(tmp_nowcolor.y - tmp_FilterfColor.y),abs(tmp_nowcolor.z - tmp_FilterfColor.z));                 float dis0 =sqrt(pow(dis.x,2)+pow(dis.y,2)+pow(dis.z,2));                 float maxdis = sqrt(3);                 float dis1 = lerp(0,maxdis,dis0);                 return dis1;             }             Inputfragment vertext_convert(Inputvrite i)             {                 Inputfragment o;                 o.pos = mul(UNITY_MATRIX_MVP,i.vertex);                 o.uv = float4(i.texcoord.xy,1,1);                 return o;             }             float4 fragment_convert(Inputfragment o) : COLOR             {                 float4 c = tex2D(_MainTex,o.uv);                 c.a *=ColorLerp(c.rgb,_FilterfColor.rgb);                 return c;             }         ENDCG         }     }     FallBack "Diffuse"