In UE Viewer Compatibility Table, it is mentioned that UE Viewer is able to extract texture.
But as this game released only for PS3 version (Downloadable only), how can one get the files from there to use UE Viewer ?
Please help, please explain.
you need extract the ISO, really I don't have this game so can't told you really, but some PS3 games have ARC extention, so you need a tool to unpack it, ok anyway here small example have with some game found here, is a PS3 game called "Drakengard 3", this one as far remember when finish download all files stored there, I only unpack the ISO and in this path I found all ".XXX" to got models, textures,etc so well you need study game.
Drakengard 3 (PS3)\BLJM61043\PS3_GAME\USRDIR\SQEX03GAME\COOKEDPS3