Depth texture not working on some devices

Unity Engine
1

I try to just show the Depth Texture in a post effect, on most devices it’s working, but on some devices like HTC One I get only a black texture. Is there another reason than the shader that this is not working on some devices?

Thanks!

Shader code:

Pass{
   
        Tags{
            "Queue"="Geometry"
            "IgnoreProjector"="True"
            "RenderType"="Opaque"
        }
       
        //cull Off
       
        CGPROGRAM
        #pragma vertex vert
        #pragma fragment frag
        #pragma fragmentoption ARB_precision_hint_fastest
        #include "unityCG.cginc"
       
        sampler2D _CameraDepthTexture;
        half4 _MainTex_TexelSize;
        float4 _CurveParams;

        struct vertexInput{
            float4 texcoord : TEXCOORD0;
            float4 vertex : POSITION;
        };
       
        struct vertexOutput{
            float4 pos : SV_POSITION;
            float4 texcoord : TEXCOORD0;
        };
       
        vertexOutput vert(vertexInput v) {
            vertexOutput o;
           
            o.pos = mul(UNITY_MATRIX_MVP,v.vertex);
            o.texcoord.xy = v.texcoord.xy;
  
            #if UNITY_UV_STARTS_AT_TOP
            if (_MainTex_TexelSize.y < 0)
                o.texcoord.xy = o.texcoord.xy * half2(1,-1)+half2(0,1);
            #endif
            return o;
        }
       
       
        fixed4 frag(vertexOutput i) : SV_Target
        {           
            float depth = UNITY_SAMPLE_DEPTH(tex2Dproj(_CameraDepthTexture, i.texcoord));
            depth         = Linear01Depth(depth);

               
            return saturate(depth);   
        }
       
        ENDCG
   
   
    }
2

So, I made my own Depth Texture with a renderWithShader camera. it’s working if I set my renderTexture format to ARGB32 however I see a lot of texture banding. All other texture formats will render all white on the device but is fine in the editor.

3

I think I found the solution. When I render my depth texture manually ( same way unity does it ) it doesn’t work. However, if I set my RenderTexture Depth format to 16 bits instead of 24 bits it’s working!

Makes me think that’s the issue with DepthTextureMode.Depth, probably rendering in 24bits.

4

I’m gonna leave this here after days of struggle: If nothing worked, trying using RenderTextureFormat.Shadowmap.