Depth Mask with Blending Edge

Question

I´m trying to get blended/ fading edges from a Mask. Using the depth mask shader (source wiki). with this modified version I can get the alpha/ blending information on the mask to control the diameter off the mask (base Alpha Cutoff)

[CODE]Shader "Transparent/Mask" {

     // by moffatjason.

 Properties 

 {
     _MainTex ("Base (RGB) Alpha (A)", 2D) = "white" {}
     _Cutoff ("Base Alpha cutoff", Range (0,.9)) = .5
 }

 SubShader {

     // Render the mask after regular geometry, but before masked geometry and
     // transparent things. 
     
     Tags {"Queue" = "Geometry+10"}
     
     // Don't draw in the RGBA channels; just the depth buffer

     ColorMask 0
     ZWrite On
     
     Pass 
     
     {
         AlphaTest LEqual [_Cutoff]       
         SetTexture [_MainTex] {
             combine texture * primary, texture
         }

     }

 }

}[/CODE]

...But Im trying to get Blending/ Fading edges instead of the solid cut i´m getting.

PS: made same thread in unity forum with images

Answer 1

zammyart.com/mask.unitypackage

move slider at transparent cube's material and check is it what you are looking for

you can also repeat this yourself:

import shader to project (shader code below)
create a primitive mesh
scale mesh so it covers whole screen but not larger then screen (exactly screen size)
make for mesh a material with this shader
make a fadeout texture (Alpha channel only used) and assign to material

got it. slide a single slider in material and you got greyscale effect by mask from texture

Shader "Transparent/Mask" { Properties { _MainTex ("Alpha (A) only", 2D) = "white" {} _GreyPower ("Grey color power", Range(0,2)) = 1 } SubShader { Tags {"Queue" = "Geometry+10"} GrabPass { } Pass { Fog { Mode Off } Blend SrcAlpha OneMinusSrcAlpha

          CGPROGRAM
 
             #pragma vertex vert
             #pragma fragment frag
     
             sampler2D _GrabTexture;
             sampler2D _MainTex;
             float _GreyPower;
 
             struct appdata
             {
                 float4 vertex : POSITION;
                 float4 texcoord : TEXCOORD0;
             };
 
             struct v2f
             {
                 float4 pos : SV_POSITION;
                 float4 uv : TEXCOORD0;
             };
 
             v2f vert (appdata v)
             {
                 v2f o;
                 o.pos = mul(UNITY_MATRIX_MVP, v.vertex);
                 o.uv = float4(v.texcoord.xy, 0, 0);
                 return o;
             }
 
             half4 frag( v2f i ) : COLOR
             {
                 half4 c = tex2D(_GrabTexture, float2(i.uv.x, 1 - i.uv.y));
                 c.rgb = (c.r + c.g + c.b) * 0.33;
                 c.a = saturate(tex2D(_MainTex, i.uv.xy).a + _GreyPower - 1);
                 return c;
             }
             ENDCG
         }
     }
 }

Depth Mask with Blending Edge

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