Shader "Unlit/ScreenDepth"
{
SubShader
{
Pass
    {
    CGPROGRAM
    #pragma vertex vert
    #pragma fragment frag
    #include "UnityCG.cginc"

    sampler2D _CameraDepthTexture;

    struct v2f {
        float4 pos : SV_POSITION;
        float4 scrPos : TEXCOORD1;
    };

    v2f vert (appdata_base v)
    {
        v2f o;
        o.pos = UnityObjectToClipPos (v.vertex);
        o.scrPos = ComputeScreenPos(o.pos);

        o.scrPos.z = COMPUTE_DEPTH_01;

        #if defined (UNITY_UV_STARTS_AT_TOP)
        // For DirectX-like systems flip vertical
        //o.scrPos.y = 1 – o.scrPos.y;
        #else
        // For OpenGL-like systems do nothing
        #endif
        return o;
    }

    float4 frag (v2f i) : COLOR
    {
        float depthValue = Linear01Depth (tex2Dproj(_CameraDepthTexture, UNITY_PROJ_COORD(i.scrPos)).r);
        depthValue = i.scrPos.z;
        //depthValue *= 10;
        return float4( depthValue, depthValue, depthValue, 1 );
    }

    ENDCG
    }
    }
}