chg to try to support more image formats, ignore gamma in PNG files
chg to try to support more image formats, ignore gamma in PNG files

nakijun/vtp,markraz/vtp,seanisom/vtp,seanisom/vtp,seanisom/vtp,seanisom/vtp,markraz/vtp,nakijun/vtp,markraz/vtp,nakijun/vtp,seanisom/vtp,markraz/vtp,nakijun/vtp,markraz/vtp,nakijun/vtp