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What game? Methods and results could vary from one game to another...
I have never played with that game, but if they are textures, you could try using TexMod with the PS2 emulator: https://www.youtube.com/watch?v=UuiwM_xbL4k
3D ripper DX works on PCXS2, I've used it to rip from The Rumble Fish port, and Shwa used it to rip stages as well. It rips everything that appears on the screen each frame, and doesn't rip duplicates.Of course those links are on my dead site so if you want to see what the results look like, here are my two resource packs.http://www.mediafire.com/file/cp8gr8m4pkj0q46/The_Rumble_Fish_Assets_pt.1.7z/filehttp://www.mediafire.com/file/5opiitb3qtbbijm/The_Rumble_Fish_Assets_pt.2.7z/fileIIRC you might need to do color correction on the ripped .dds files from PS2 games. When I ripped the Rumble Fish stuff I needed to apply red to the images because they came out all on the blue spectrum, though it's been a while and I can't remember exactly.