I found one chack for it:
https://translate.google.com/translate?hl=en&sl=auto&tl=en&u=https%3A%2F%2Fqiita.com%2FEGJ-Nori_Shinoyama%2Fitems%2F8b3c2e4e372f05e33476
You can set texture group to character to give textures a bit higher priority. CPP file seams to confirm it.