Players are familiar with the term “Motion Blur”, but consider it a landmine. In fact, this visual feature has a very specific use and can very strongly influence the look and feel of the game you are playing. it’s especially noticeable in racing games or games that advertise realistic realism. So, this time let’s look at what motion blur is, when should you turn it on, and under what circumstances should you turn it off?
What is motion blur in games? When should you turn it off?
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What is motion blur?
Hold your hand in front of you and wave it quickly: this is motion blur. You can see everything around you in the real world, including the wings of a hummingbird in flight, a spinning wheel, or see objects whiz by in a blur when you look out the window of a car or train. Blurring occurs because although light travels very quickly, sometimes for only a fraction of a second, the light sensors we use to create images take much longer to work.
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In the human eye, the retina uses electrochemistry to respond to light and then sends the information to the brain in the form of an electrical signal. If the movement is fast enough, such as when you wave your hand in front of your face, photons from the moving object will arrive at different points on the retina almost at the same time, creating a blurry effect. The same thing happens with camera sensors. Rapid movement will appear as motion blur in the recording as photons from the moving object trace a path along the image sensor for the duration of one frame. On a camera, we can reduce or eliminate motion blur by using a shutter, a device that controls the length of time that light hits the sensor.
If the shutter speed is very fast, you will get a sharp image with almost no blur; if the shutter speed is very slow, you will get a blurry image with many overlapping images on dynamic objects. Cinematographers typically use shutter speeds of double the frame rate to simulate natural motion blur. Please note the term “natural motion blur” as it is very important in the discussion of motion blur in games. You can see the motion blur effect at different shutter speeds in the video below:
Why do games need motion blur?
If motion blur is a bad thing in games, why do developers continue to use it? There are two important reasons why motion blur should be present in games: to create pleasant, realistic images and to compensate for low frame rates.
First, our brain expects motion blur from moving objects. Because we see blurry motion with our eyes, it has become one of many visual signals that our brain uses to understand the world. If something is blurry, it means it is moving fast. When fast moving images are not blurry, your brain will have difficulty accepting the reality of it, the best example of this is stop motion animation, you can immediately tell when something stops moving because there is no motion blur, this is because it is not a recording of a real moving object, but is static Some still photos of the object. If you don’t know what stop motion animation is, you can watch the video below. Video game visuals are a form of virtual stop-motion animation that renders a series of still images, with the virtual “lens” not capturing any natural motion blur that doesn’t exist at all. In other words, if you want motion in a computer game to appear natural to the human eye, you need to simulate motion blur in some way.
Second, when the frame rate is low (like 12 fps for animation, 24 fps for movies, 30 fps for some console games), the gaps of movement between each frame become noticeable. With motion blur, your brain compensates and you perceive smoother motion than the lower frame rate actually produces.
When should you turn off motion blur?
Different people have different sensitivity to different degrees of motion blur. You can adjust it or turn it off to make it more appropriate or more comfortable. While motion blur is essential for natural graphical movement on your computer, there are some situations where it makes sense to turn it off or turn it down altogether:
- camera motion blur
This type of motion blur affects the entire frame whenever the camera moves and is the category referred to by most people who don’t like motion blur, as opposed to object-based motion blur. Object-based motion blur causes objects in the scene to become blurry when moving quickly, such as waving weapons, moving cars, etc. If you want realistic graphical effects, the sum of the motion blur of each object is the most ideal. Many modern games let you adjust the intensity of an effect rather than simply turning it on and off. Then adjust the slider or setting to make the blur more natural at the current frame rate.
- Competitive games
Competitive gamers often don’t care about maximum graphical fidelity; they care above all about the final victory, so players turn off all graphics settings (not just motion blur) to get the sharpest possible image and high frame rates.
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High frame rate games
If you play at high frame rates above 120fps, the need for motion blur is reduced but not eliminated. You may need to turn it down until the dynamics feel smooth and natural, without fluctuations. -
Poor quality motion blur
There are many ways to simulate motion blur, some of which are less effective than others. If the quality of motion blur is poor and significantly reduces image quality, overall it is best to turn it off for a better gaming experience.
How to disable/enable motion blur in the game?
If you want to adjust or turn off motion blur in a game it’s usually easy, however the details vary from game to game as they have their own combination of settings and menu design, usually in Settings >> Graphics. In some games, you may have separate options for camera motion blur and per-object motion blur. In other cases, the setting may only affect the camera’s motion blur, without the ability to change the per-object motion blur setting. It all depends on what the developer allows you to do.
2024-01-15 03:40:35
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