Intersection shader via depth compare breaks in deferred rendering mode?

Graphics Shaders & Materials
1

SOLUTION TO PROBLEM CAN BE FOUND HERE:
How to have surface shader logic that only runs in deferred mode? - Unity Engine - Unity Discussions

I’m writing a custom shader which detects intersecting geometry by comparing the fragment depth to the scene depth like so:

// ...
Tags {
    "Queue" = "Overlay"
    "RenderType" = "Overlay"
    "IgnoreProjector" = "True"
}

    CGPROGRAM
    #pragma surface surf Standard vertex:vert
    #pragma target 3.0
// ...

void vert(inout appdata_full v, out Input o) {
    UNITY_INITIALIZE_OUTPUT(Input, o);
    COMPUTE_EYEDEPTH(o.eyeDepth);
}

void surf (Input i, inout SurfaceOutputStandard o) {
    float depth = i.eyeDepth;
    float sceneDepth =  inearEyeDepth(SAMPLE_DEPTH_TEXTURE_PROJ(_CameraDepthTexture,UNITY_PROJ_COORD(i.screenPos)));
    float depthBlend = clamp((sceneDepth - depth) / 0.1, 0, 1);     
 
    o.Emission = depthBlend;
}

It works great in Forward rendering (top) but breaks in Deferred mode (bottom):

579×694 170 KB

I end up with black color and weird white artifacts near edges it seems.

Do I have to do something special for this to work in Deferred?

2

Deferred render depth layer once and then apply shader at image level after, you are making a shader per object basis, it wouldn’t work.