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public static async Task<Texture2D> ReadTextureFromFileAsync(string pathToFileWithoutExtension, bool linear = true, FilterMode filterMode = FilterMode.Bilinear, TextureWrapMode wrapMode = TextureWrapMode.Repeat)
    {
        Texture2D tex;

        if (!File.Exists(pathToFileWithoutExtension + ".gz")) return null;
        using (var fileStream = File.Open(pathToFileWithoutExtension + ".gz", FileMode.Open, FileAccess.Read, FileShare.Read))
        {
            using (GZipStream gzip = new GZipStream(fileStream, CompressionMode.Decompress))
            {
                using (MemoryStream stream = new MemoryStream())
                {
                    await gzip.CopyToAsync(stream);

                    var rawTextureDataWithInfo = new byte[stream.Length];
                    stream.Seek(0, SeekOrigin.Begin);
                    await stream.ReadAsync(rawTextureDataWithInfo, 0, rawTextureDataWithInfo.Length);
                    {
                        var format = (TextureFormat)BitConverter.ToInt32(rawTextureDataWithInfo, 0);
                        int width = BitConverter.ToInt32(rawTextureDataWithInfo, 4);
                        int height = BitConverter.ToInt32(rawTextureDataWithInfo, 8);

                        var rawTextureData = new byte[rawTextureDataWithInfo.Length - 12];
                        Array.Copy(rawTextureDataWithInfo, 12, rawTextureData, 0, rawTextureData.Length);

                        tex = new Texture2D(width, height, format, false, linear);
                        tex.filterMode = filterMode;
                        tex.wrapMode = wrapMode;
                        tex.LoadRawTextureData(rawTextureData);
                        tex.Apply();
                    }
                }
            }
            fileStream.Close();
        }
        return tex;
    }

    public static void SaveTextureToFile(this Texture2D tex, string pathToFileWithoutExtension)
    {
        var directory = Path.GetDirectoryName(pathToFileWithoutExtension);
        if (directory == null)
        {
            Debug.LogError("Can't find directory: " + pathToFileWithoutExtension);
            return;
        }
        if (!Directory.Exists(directory)) Directory.CreateDirectory(directory);

        using (var fileToCompress = File.Create(pathToFileWithoutExtension + ".gz"))
        {
            int w = tex.width;
            int h = tex.height;
            var rawTextureData = tex.GetRawTextureData();
            var textureInfo = new List<byte>();

            textureInfo.AddRange(BitConverter.GetBytes((uint)tex.format));
            textureInfo.AddRange(BitConverter.GetBytes(w));
            textureInfo.AddRange(BitConverter.GetBytes(h));
            rawTextureData = Combine(textureInfo.ToArray(), rawTextureData);

            using (GZipStream compressionStream = new GZipStream(fileToCompress, CompressionMode.Compress))
            {
                compressionStream.Write(rawTextureData, 0, rawTextureData.Length);
            }

            fileToCompress.Close();
        }
    }