卡通渲染（描边方案）

法线外扩

Pass{Name"OutLine"Cull FrontZWrite OnCGPROGRAM#pragma vertex vert#pragma fragment frag#include "UnityCG.cginc"struct appdata{float4 vertex : POSITION;float3 normal : NORMAL;};struct v2f{float4 PositionClip : SV_POSITION;};float _EdgeWidth;float4 _EdgeColor;v2f vert (appdata v){v2f o;float3 PositionView= UnityObjectToViewPos(v.vertex);float3 NormalWS=UnityObjectToWorldNormal(v.normal);float3 NormalView =normalize(mul((float3x3)UNITY_MATRIX_V, NormalWS));//相机空间法线PositionView += NormalView * _EdgeWidth*0.001;o.PositionClip=mul(UNITY_MATRIX_P,float4(PositionView,1.0));return o;}half4 frag (v2f i) : SV_Target{return _EdgeColor;}ENDCG}

基于模版测试的法线外扩

//Base Pass中确认模版值
Stencil
{Ref 1Comp AlwaysPass Replace
}
//OutLine Pass
Pass{Stencil{Ref 1Comp NotEqual}CGPROGRAM#pragma vertex vert#pragma fragment fragfloat _EdgeWidth;fixed4 _EdgeColor;struct a2v {float4 vertex : POSITION;float3 normal : NORMAL;}; struct v2f {float4 pos : SV_POSITION;};v2f vert (a2v v) {v2f o;float4 pos = mul(UNITY_MATRIX_MV, v.vertex); float3 normal = mul((float3x3)UNITY_MATRIX_IT_MV, v.normal);  normal.z = -0.5;pos = pos + float4(normalize(normal), 0) * _EdgeWidth*0.01;o.pos = mul(UNITY_MATRIX_P, pos);return o;}float4 frag(v2f i) : SV_Target { return float4(_EdgeColor.rgb, 1);               }ENDCG}