Running the game on Xenia with a modern GPU (anything equivalent to an RTX 2060 or RX 5700 and above) produces a surprising result. Because the game relies so heavily on shaders, clearing the pipeline cache on Xenia results in a remarkably clean image. You can push the internal resolution higher than the console ever could, eliminating the "jaggies" that plagued the original release. The dusty streets of Mexico and the particle effects during explosions (of which there are many) actually hold up decently well when rendered at 1080p or 1440p.
If textures are missing, check if d3d12 works better than vulkan on your specific card, though Vulkan is generally preferred. Alternative: RPCS3 army of two the devil 39s cartel xenia