??????????????????????

??

???????????????????????????????????????????????????????????unity??????????????????

?????????????????????????????????????????????????????????????????????????????????????????????

?????????????????????????????????????????????????????

????????ff7???????2?

????????????????????????????????????????????????????????????????????????????PBR??

????????????????

????RT???????

????????????????????

??????????????????????unity?????No tonemapping ?

???????????????

??????????????shader????

??????????????????

???????????

???????????????????2???

1???
??????????????

2???
????????????

???????????????

????????????????????????????????????????????????�???????????�?????????????????????????

??????????Matcap?????????????????????????????PBR?ibl?????????

??Matcap

??MaterailCapture??????????????????????xy?????????????????????????wiki???
http://wiki.unity3d.com/index.php/MatCap

?????????????????????????????????????normal?????????2???????

1. //MatCap ???
   
2. half2 MatCapUV ;
   
3. matCapUV.x = dot(UNITY_MATRIX_IT_MV[0].xyz,v.normal);
   
4. matCapUV.y = dot(UNITY_MATRIX_IT_MV[1].xyz,v.normal);
   
5. matCapUV = matCapUV * 0.5 + 0.5;
   
6. //MatCap ???
   
7. // float3 N = normalize(UnityObjectToWorldNormal(v.normal));
   
8. // float3 viewPos = UnityObjectToViewPos(v.vertex);
   
9.   float2 MatCapUV (in float3 N,in float3 viewPos)
   
10.   {
    
11.     float3 viewNorm = mul((float3x3)UNITY_MATRIX_V, N);
    
12.         float3 viewDir = normalize(viewPos);
    
13.         float3 viewCross = cross(viewDir, viewNorm);
    
14.         viewNorm = float3(-viewCross.y, viewCross.x, 0.0);
    
15.         float2 matCapUV = viewNorm.xy * 0.5 + 0.5;
    
16.         return matCapUV;
    
17.   }

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????????????????VS????

????????????????????Matcap?????????????

???Matcap?????????Matcap??alpha???

1. 
   
2. [HDR]_SpColor("Sp Color", Color) = (1.0,1.0,1.0,1.0)
   
3. //?????????????????????
   
4. float3 spmatCap= tex2D(_CapTex,matCapuv);
   
5. spmatCap *=_SpColor.rgb
   
6. 
   
7. o.color.rgb = spmatCap  ;
   
8. o.color.a = spmatCap .r;

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3.1 ????MASK

????????????????????????????????????

A.????????

??????????????????????????????????
?????????2?????????

1???????????
2?????????????

1. float3 thicknessTex= tex2D(_MaskTex, i.uv);
   
2. float sThickness = thicknessTex.r * i.color.r; //??????????

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???????R?????????????????

??????????????????

B.??????

????????????????

1. 
   
2. _FenierEdge("Fenier Range", Range(-2, 2)) = 0.0
   
3. _FenierIntensity("Fenier intensity", Range(0, 10)) = 2.0
   
4. //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   
5. float3 V = normalize(_WorldSpaceCameraPos - i.worldPos);
   
6. float NoV = dot(N,V);
   
7. 
   
8. float EdgeThickness (in float NoV)
   
9. {
   
10.    float ET = saturate((NoV-_FenierEdge)*_FenierIntensity);
    
11.    return ET;
    
12. }

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????????????????????

?????????????????????????????

1. _FenierEdge("FenierRange", Range(-2, 2)) = 0.0
   
2. _FenierIntensity("Fenierintensity", Range(0, 10)) = 2.0
   
3. //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   
4. float3 V = normalize(_WorldSpaceCameraPos - i.worldPos);
   
5. float NoV = dot(N,V);
   
6. float3 thicknessTex= tex2D(_MaskTex, i.uv) ;
   
7. float sThickness = thicknessTex.r * i.color.r; //??????????
   
8. float fThickness = thicknessTex.g;// ???????
   
9. 
   
10. float EdgeThickness (in float NoV ,in float eThickness )
    
11. {
    
12.    fThickness = (eThickness -0.5)*0.5;
    
13.    float ET = saturate((NoV-_FenierEdge+fThickness)*_FenierIntensity);
    
14.    return 1-ET*eThickness ;
    
15. }

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3.2 ??????

??????matcap???????????UV??????????????????mask?????matcap??????????????matcap?????????????????????????????

1. float Refintensity = Thickness*_Refintensity;
   
2. float3 rfmatCap = tex2D(_RfCapTex,matCapuv+Refintensity);
   
3. float3 rfmatColor= RFLerpColor(rfmatCap,Thickness)
   
4. //_BaseColor??????????????????????????
   
5. float3 RFLerpColor (in float3 rfmatCap,in float Thickness)
   
6. {
   
7.   float3 c1 = _BaseColor.rgb*0.5;
   
8.   float3 c2 = rfmatCap*_BaseColor.rgb;
   
9.   float cMask = Thickness;
   
10.     return lerp(c1,c2,cMask ); //????? *v.color.rgb ????????????????????????
    
11. }

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??????????????????????Mask ??alpha????????????????

??????????????????????????

1. float alpha = saturate(max(spmatCap.r*_SpColor.a ,Thickness)*_BaseColor.a);
   
2. //_SpColor ???????????????
   
3. //alpha???????????????????????????????
   
4. col.rgb = rfColor+spColor;//???????
   
5. col.a = alpha;

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3.3 ??????

????????????????????????????????????????????????????

????? ??MASK ? Matcap??????? N(normal) ??? ?????????normalMap????????

1. o.worldTangent =normalize(UnityObjectToWorldNormal(v.tangent));
   
2. o.worldBinormal = cross(o.worldNorm, o.worldTangent) * v.tangent.w;   
   
3. o.uv.zw = TRANSFORM_TEX(v.texcoord.xy,_NormalTex) ;//(??????UV???????????
   
4. ??????????????)
   
5. o.uv.xy = TRANSFORM_TEX(v.texcoord.xy,_MaskTex) ;
   
6. //------?VSout----------------------------------------------------------------------------------------------
   
7. 
   
8. void GetNormal(v2f i, inout float3 N)
   
9.   {
   
10.     float4 normalTex = tex2D(_NormalTex, i.uv.zw);
    
11.     float3 normalTS = normalize(UnpackNormal(normalTex));
    
12.     float3x3 tbn = float3x3(i.worldTangent, i.worldBinormal, i.worldNorm);
    
13.     N = normalize(mul(normalTS, tbn));
    
14.   }

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PS???????????????????RT???????????????????????????

?????????????????????????????????

4.1 ????

???????Matcap??????????????Matcap?????Photoshop????????????

???IBL?Phone?GGX?????? ?????????????

4.2 ???????

???????????????????????

??????????????????????

?????????3????

• ????
• ????
• ??????
  

?????????????????????????????????

???????1????????????????????? ?????????

???? ??????????????????????????????????mask?????????????

??????

???????????????????????????????????????

??????mask??????????????????????????????

????????????K????????UV????????????????????

??????

?????---?????????? RenderQueue ?????????-1????????????????????????????

???????????????RenderQueue?

?????3000???????2999???????2998?

????????????????????????????????????????????????????????????????????????

4.3 ???????

???????????????????????????????????????

??PBR???????

???????????LightProbes???????????????????????????

???Blood
?????GWB????
????https://mp.weixin.qq.com/s/-ukjq_pJqCCAYHQEcmzO3w