Unityshader Effect of Plush velvet

We're going to do a fur ball today.

The core of the algorithm through a plurality of passes, from the inside to the outside layer of the paste on a layer of transparent diffuse, the more on the outside of the local level less looks more sparse, the more blurred

Furhelper.cginc

struct V2F {float4 pos:sv_position;
	Half2 uv:texcoord0;
	Half2 Uv1:texcoord1;
Fixed4 Diff:color;

};
float _furlength;
Sampler2d _maintex;
FLOAT4 _maintex_st;
Sampler2d _furtex;
FLOAT4 _furtex_st;

float _blur;
	v2f Vert (Appdata_base v) {v2f o;
	V.VERTEX.XYZ + = V.normal * _furlength * FURSTEP;
	O.pos = Unityobjecttoclippos (V.vertex);
	O.UV = Transform_tex (V.texcoord, _maintex);
	O.uv1 = Transform_tex (V.texcoord, _furtex);
	FLOAT3 Worldnormal = Normalize (Mul (V.normal, (float3x3) unity_worldtoobject));
	O.diff = Lambertdiffuse (worldnormal);
	O.DIFF.A = 1-(Furstep * furstep);
	FLOAT4 Worldpos = Mul (Unity_objecttoworld, V.vertex);
	O.DIFF.A + = dot (normalize (_worldspacecamerapos.xyz-v.vertex), worldnormal)-_blur;
return o;
} float _cutoff;

float _thickness;
	Fixed4 Frag (v2f i): sv_target {fixed4 col = tex2d (_maintex, I.UV);
	Fixed alpha = tex2d (_furtex, i.uv1). R;
	Col *= I.diff;
	COL.A *= Step (Lerp (_cutoff, _cutoff + _thickness, furstep), Alpha);
return col; }

Furshader.shader

Shader "Custom/furshader" {Properties {_maintex ("Texture", 2D) = "White" {} _furtex ("Fur pattern", 2D) = "White" {} _diffuse ("Diffuse value", range (0, 3)) = 1 _furlength ("Fur Length", Range (0.0, 1)) = 0.5 _cutoff ("Alpha CutOff", Ra Nge (0, 1)) = 0.5 _blur ("Blur", range (0, 1)) = 0.5 _thickness ("Thickness", range (0, 0.5)) = 0} cginclude fixed
	_diffuse;
		Inline fixed4 lambertdiffuse (float3 worldnormal) {FLOAT3 Lightdir = normalize (_WORLDSPACELIGHTPOS0.XYZ);
		float NDOTL = max (0.2, Dot (worldnormal, lightdir));
	return ndotl* _diffuse;
		} ENDCG Subshader {tags{"rendertype" = "Transparent" "Queue" = "Transparent" "lightmode" = "Forwardbase"} Zwrite Off Blend srcalpha oneminussrcalpha Pass {cgprogram #pragma vertex vert #pragma fragment Frag #define FU RSTEP 0.05 #include "Furhelper.cginc" ENDCG} Pass {cgprogram #pragma vertex vert #pragma fragment Frag #define Furstep 0.10 #include "Furhelper.cginc" ENDCG} Pass {CGProgram #pragma vertex vert #pragma fragment frag #define Furstep 0.15 #include "furhelper.cginc" ENDCG} Pass {
		Cgprogram #pragma vertex vert #pragma fragment frag #define Furstep 0.20 #include "furhelper.cginc" ENDCG} Pass {
	Cgprogram #pragma vertex vert #pragma fragment Frag #define FURSTEP 0.25 #include "Furhelper.cginc" ENDCG} Pass

		{cgprogram #pragma vertex vert #pragma fragment Frag #define FURSTEP 0.30 #include "Furhelper.cginc" ENDCG}

		Pass {cgprogram #pragma vertex vert #pragma fragment Frag #define FURSTEP 0.35 #include "Furhelper.cginc" ENDCG} 

		Pass {cgprogram #pragma vertex vert #pragma fragment frag #define Furstep 0.40 #include "Furhelper.cginc" ENDCG}
	Pass {cgprogram #pragma vertex vert #pragma fragment frag #define FURSTEP 0.45 #include "furhelper.cginc" ENDCG } Pass {cgprogram #pragma vertex vert #pragma fragment Frag #define FURSTEP 0.50 #include "Furhelper.cginc" ENDC
G} Pass {Cgprogram#pragma vertex vert #pragma fragment Frag #define FURSTEP 0.55 #include "Furhelper.cginc" ENDCG} Pass {Cgprogra M #pragma vertex vert #pragma fragment frag #define FURSTEP 0.60 #include "furhelper.cginc" ENDCG} Pass {Cgprog RAM #pragma vertex vert #pragma fragment frag #define Furstep 0.65 #include "furhelper.cginc" ENDCG} Pass {CGPR Ogram #pragma vertex vert #pragma fragment Frag #define Furstep 0.70 #include "Furhelper.cginc" ENDCG} Pass {CG
		Program #pragma vertex vert #pragma fragment frag #define FURSTEP 0.75 #include "furhelper.cginc" ENDCG} Pass {
		Cgprogram #pragma vertex vert #pragma fragment Frag #define FURSTEP 0.80 #include "Furhelper.cginc" ENDCG} Pass {
	Cgprogram #pragma vertex vert #pragma fragment Frag #define FURSTEP 0.85 #include "furhelper.cginc" ENDCG} Pass

		{cgprogram #pragma vertex vert #pragma fragment frag #define FURSTEP 0.90 #include "Furhelper.cginc" ENDCG} Pass {Cgprogram #pragmaVertex vert #pragma fragment Frag #define FURSTEP 0.95 #include "Furhelper.cginc" ENDCG}}