Screen space fog aliasing issues

Hi,
There is a texture / mask (_CameraDigitalDeptertexture) of the depth of the entire screen, which I transmit to the shader. I do not edit this texture.
The fog is made based on this texture, but it has smoothing artifacts on the border of objects:
https://yadi.sk/i/VFlFpfT73YMgE3

The picture without fog looks like this:
https://yadi.sk/i/ADEqdi6t3YMdVy

There is a part of image effect shader:

Code (CSharp):

1. // Applies one of standard fog formulas, given fog coordinate (i.e. distance)
2. float ComputeFogFactor(float coord) {
3.         float fog = 0.0;
4. #if _FOG_EXP
5.          // factor = exp(-density*z)
6.           fog = _Density * coord;
7.           fog = exp2(-fog);
8. #else
9.            #if _FOG_EXP2
10.                         // factor = exp(-(density*z)^2)
11.                         fog = _Density * coord;
12.                         fog = exp2(-fog * fog);
13.              #else // FOG_LINEAR
14.                         fog = coord * _LinearGrad + _LinearOffs;
15.              #endif
16. #endif
17.               return fog;
18. }
19.  
20. // Distance-based fog
21. float ComputeDistance(
22.                  #if _RADIAL_DIST
23.                  float3 ray,
24.                  #endif
25.                   float depth
26.                    ) {
27.         float dist;
28. #if _RADIAL_DIST
29.          dist = length(ray * depth);
30. #else
31.           dist = depth * _ProjectionParams.z;
32. #endif
33.            // Built-in fog starts at near plane, so match that by subtracting the near value.
34.             dist -= _ProjectionParams.y;
35.             return dist;
36. }
37.  
38.  
39. float4 frag (v2f i) : COLOR {
40. ....
41. float depth = Linear01Depth( SAMPLE_DEPTH_TEXTURE(_CameraCustomDepthTexture, i.uv.xy).r )
42.  
43. // DUST:
44. // fog amount.
45. float g = ComputeDistance(
46. #if _RADIAL_DIST
47. i.ray,
48. #endif
49. depth ) - _DistanceOffset;
50.  
51. float fog = ComputeFogFactor( max(0.0, g) );
52.  
53. // Look up the skybox color.
54. float3 skyColor = DecodeHDR(texCUBE(_SkyCubemap, i.ray), _SkyCubemap_HDR);
55. skyColor *= _SkyTint.rgb * _SkyExposure * unity_ColorSpaceDouble;
56. // Lerp between source color to skybox color with fog amount.
57. finalColor.rgb = lerp(skyColor, finalColor.rgb, fog);
58.  
59. return finalColor;
60. }

I tried to change the depth filtering modes, it did not help.
I tried to blur the texture of the depth and this did not help, the strips only increase:

Code (CSharp):

1. float size = 1;
2.                 float2 up = _CameraCustomDepthTexture_TexelSize.xy * half2(0.0, 1.0) * size;
3.                 float2 rt = _CameraCustomDepthTexture_TexelSize.xy * half2(1.0, 0.0) * size;
4.                 float d_up = SAMPLE_DEPTH_TEXTURE(_CameraCustomDepthTexture, i.uv.xy+up).r;
5.                 float d_dn = SAMPLE_DEPTH_TEXTURE(_CameraCustomDepthTexture, i.uv.xy-up).r;
6.                 float d_rt = SAMPLE_DEPTH_TEXTURE(_CameraCustomDepthTexture, i.uv.xy+rt).r;
7.                 float d_lt = SAMPLE_DEPTH_TEXTURE(_CameraCustomDepthTexture, i.uv.xy-rt).r;
8.                 float d_m  = SAMPLE_DEPTH_TEXTURE(_CameraCustomDepthTexture, i.uv.xy).r;*/

I broke my head, I can not understand the reason for this artifact.
What is the cause of the artifact and how to fix it?

 

The problem is not solved yet. Nobody knows how to fix this?