I´ve watched the 2017 GT Masters race and decided to update the billboards to the ones which have been used. Since this is really not a good track in graphical ways, my work is really limited but I think they are better than the old ones. So simply extract the texture.rar into your eurospeedwaygp folder, allow to overwrite it (make a backup before!).
Btw, someone should really update the AI line, I hope this will be possible! Any volunteers?
Here´s the link to the track:
Have fun, and Sport frei.