Drop .rpack file onto the exe, it will export all models/textures to corresponding folders 

Dying Light 2 tool

PS4 and PC versions only difference is textures swizzled or not.

All main textures are in common_textures_0_pc.rpack, all GUI images in gui_common_pc.rpack

for PS4 its common_textures_0_orbis.rpack, all GUI images in gui_common_orbis.rpack

All models are in common_meshes_pc.rpack / common_meshes_orbis.rpack