Why are you not using the DPfix built in texture dump/override functionality?Also it crossed my mind that I could maybe upscale the textures with a high quality upscaler like NNEDI. I did manage to dump the textures from these big DPSerial.00x files with a script but they are in an obscure .xpc format which I have no idea how to convert to .dds. So I gave up :/
You are lucky. Both times when I thought I had introduced a repeatable crash in DPfix and just couldn't find it I finally renamed the .dll and figured out it was actually the vanilla game which was crashing. In both cases it was fixed by a reboot.Maybe I'm lucky, but I played through the entire campaign and have never experienced a crash due to the stock game EXCEPT for the crash that happens after the cutscene in the shed by the art gallery;
This was much easier when working with Dark Souls, as when that crashed I could be 100% certain that it was my fault.