Texture to texture2D

    private void SaveRenderTextureToPNG(Texture inputTex, string file)
    {
        RenderTexture temp = RenderTexture.GetTemporary(inputTex.width, inputTex.height, 0, RenderTextureFormat.ARGB32);
        Graphics.Blit(inputTex, temp);
        Texture2D tex2D = GetRTPixels(temp);
        RenderTexture.ReleaseTemporary(temp);
        File.WriteAllBytes(file, tex2D.EncodeToPNG());
    }

    private Texture2D GetRTPixels(RenderTexture rt)
    {
        RenderTexture currentActiveRT = RenderTexture.active;
        RenderTexture.active = rt;
        Texture2D tex = new Texture2D(rt.width, rt.height);
        tex.ReadPixels(new Rect(0, 0, tex.width, tex.height), 0, 0);
        RenderTexture.active = currentActiveRT;
        return tex;
    }