Unity fade post-processing effect

Question

I'm trying to build a game that uses the Pix2Pix post-processing effect for Unity, which is an image-to-image translation with deep neural networks. It works well but I want to fade this effect with the non-post-processing render. The post-processing effect allows only an off-on feature.

I'm trying to get an in-between that I could access via script in order to change the render

Here with the post processing :

Here without :

Is there a way to get an in-between?

EDIT:

I tried to follow Gabriele's idea of using color.lerp method to lerp the input and output (named as sourceRT and resultRT), It gives me a gray output, here is what I tried (in Postprocessing.cs) :

    // RenderTexture Source to Color[]
    Texture2D texSources = new Texture2D(256, 256, TextureFormat.RGB24, false);

    texSources.ReadPixels(new Rect(0, 0, 256, 256), 0, 0);

    Color[] sourcePixels = texSources.GetPixels(0, 0, 256, 256);


    // RenderTexture Result to Color[]

    Texture2D texResult = new Texture2D(256, 256, TextureFormat.RGB24, false);

    texResult.ReadPixels(new Rect(0, 0, 256, 256), 0, 0);

    Color[] resultPixels = texSources.GetPixels(0, 0, 256, 256);


    // Blend Pixel comporte un lerping de chaque pixel selon un float
    Color[] blendPixel = new Color[resultPixels.Length];

    Texture2D blendTexture = new Texture2D(256, 256, TextureFormat.RGB24, false);

    // Lerping via a loop in the array
    for (int i = 0; i < resultPixels.Length; i++)
    {
        Color c = Color.Lerp(sourcePixels[i], resultPixels[i], ratio);
        blendPixel[i] = c;
    }
    // tranformation of blendPixel to Texture2d
    blendTexture.SetPixels(blendPixel);


    // END LERP

    // blendpixel
    cmd.Blit(blendTexture, context.destination);

Answer 1

Even though i am not familiar with this library the first solution that comes to mind is to do a lerp from the input to the output by creating a new Texture2D and interpolate each pixel between the first image and the second one. If Pix2Pix does not provide any way to extract the output as an image you can renderer the output of the camera to a texture.