I'm wondering why there is difference rendering from Quest Pro to Quest 2.

[edo_m18]

I’m trying to render blurry background on a plane. I got the result on a Quest 2 device and a Unity Editor but there is difference on a Quest Pro device.

As you can see, the result is bit wrong.

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Below is desired result.

Additionally, above image shows you a plane that has orange line is a position where a captured texture is projected. And the bottom of the image shows you the desired result that I want.

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Flow:
I tried following flow.

1. Captured the scene with each camera, VR left camera and right.
2. Blurred them.
3. Projected the textures to the plane that I mentioned before (orange rectangle plane)

Below is the shader code to show a projected plane.

v2f vert(appdata v)
{
    v2f o;
    UNITY_SETUP_INSTANCE_ID(v);
    UNITY_TRANSFER_INSTANCE_ID(v, o);
    UNITY_INITIALIZE_OUTPUT(v2f, o);
    UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(o);

    o.vertex = UnityObjectToClipPos(v.vertex);

    float scale = 1.0;
    o.uvgrab.xy = (float2(o.vertex.x, o.vertex.y * scale) + o.vertex.w) * 0.5;
    o.uvgrab.zw = o.vertex.zw;
    return o;
}

fixed4 frag(v2f i) : SV_Target
{
    UNITY_SETUP_STEREO_EYE_INDEX_POST_VERTEX(i);
    if (unity_StereoEyeIndex == 0)
    {
        return tex2Dproj(_LeftTex, UNITY_PROJ_COORD(i.uvgrab)) * _Color;
    }
    else
    {
        return tex2Dproj(_RightTex, UNITY_PROJ_COORD(i.uvgrab));
    }
}

Does anyone know what happened?