Medium-Size Image Quality / Scaling Issues

[MyBBHacks]

We use MyBB's generate thumbnail function currently. The default quality is at 75,%

Found in
inc\functions_image.php(21): function generate_thumbnail($file, $path, $filename, $maxheight, $maxwidth)

Code:

        switch($imgtype)
        {
            case 1:
                if(function_exists("imagegif"))
                {
                    @imagegif($thumbim, $path."/".$filename);
                }
                else
                {
                    @imagejpeg($thumbim, $path."/".$filename);
                }
                break;
            case 2:
                @imagejpeg($thumbim, $path."/".$filename);
                break;
            case 3:
                @imagepng($thumbim, $path."/".$filename);
                break;
        }

You would need to change imagejpeg($thumbim, $path."/".$filename);
To
imagejpeg($thumbim, $path."/".$filename,100);

100 keeps it the original quality