Use a tool like IGCS (Injectable Generic Camera System) to freeze the game world while keeping the camera active.
Let the frames accumulate for 5–10 seconds. You will see the movement (water, fire, or grass) slowly turn into a smooth, misty texture. Pro Tips for Better Results reshade long exposure
If you want the game to look like a long exposure while you play: Use a tool like IGCS (Injectable Generic Camera
This is the gold standard for adding high-quality, velocity-based blur that looks like a camera shutter. reshade long exposure