this post was submitted on 10 Mar 2025
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On Motion blur, our eye's motion blur, and camera's shutter speed motion blur are not the same. Eyes don't have a shutter speed. Whatever smearing we see is the result of relaxed processing on the brain side. Under adrenaline with heavy focus, our motion blur disappears as our brain goes full power trying to keep us alive. If you are sleep deprived and physically tired, then everything is blurred, even with little motion from head or eyes.
Over 99% of eye movement (e.g. saccadic eye movement) is ignored by the brain and won't produce a blurred impression. It's more common to notice vehicular fast movement, like when sitting in a car, as having some blur. But it can be easily overcome by focused attention and compensatory eye tracking or ocular stabilization. In the end, most of these graphical effects emulate camera behavior rather than natural experience, and thus are perceived as more artificial than the same games without the effects. When our brain sees motion blur it thinks movie theater, not natural everyday vision.
Yeah, if you see motion blur in real life, that usually means something bad, yet game devs are not using it for those purposes.
Eyes do have a "shutter speed", but the effect is usually filtered out by the brain and you need very specific circumstances to notice motion blur induced by this.
No, they don't. As there is no shutter in a continuous parallel neural stream. But, if you have any research paper that says so, go ahead and share.
It has nothing to do with a neural stream, it's basic physics.
Explain, don't just antagonize. I bet you don't understand the basic physics either. I'm open to learn new things. What is the eye's shutter speed? sustain your claim with sources.
I put "shutter speed" in quotes for a reason. To gather the required amount of light, the sensor must be exposed to it for a specific amount of time. When it's dark, the time increases. It doesn't matter if it's a camera or your eye.
That's sensitivity, not shutter speed. Eye's do not require time for exposure, but a quanta or intensity of light. This sensitivity is variable, but not in a time dilated way. Notice that you don't see blurrier in darker conditions, unlike a camera. You do see in duller colors, as a result of higher engagement of rods instead of cones. The first are more sensitive but less dense in the fovea, and not sensitive to color. While a camera remains as colorful but more prone to motion blur. This is because the brain does not take individual frames of time to process a single still and particular image. The brain analyses the signals from the eye continuously, dynamically and in parallel from each individual sensor, cone or rod.
In other words, eye's still don't have, even a figurative, shutter speed. Because eyes don't work exactly like a camera.
You do see blurrier in the dark, it's just your brain filters it out. You can trick it though by looking at a small bright and moving object in the darkness, like a watch. You will notice that the image outside of bright watch moves with a delay and is blurred.
Also camera images are not that colourful in the darkness, unless you're talking about computational photography tricks used in mobile phones. All optical systems follow the exact same laws of physics and they produce the same results. What's different is post processing by a brain or your CPU in Lightroom.
Are we going philosophical now? If your brain filters it out from consciousness, are you really seeing it? If you are aware that the brain filtered it, did it really filtered it?
Anyways. No, the brain is not a computer, stop.