Addition of motion blur in the form of frame blending for eye comfort

[ItsPasi]

While I know this is a controversial topic, please read the full text below.

I am the creator of the "Natural Motion Blur" mod for Minecraft with 20k downloads which can be found on my Github page. The mod implements motion blur in the form of frame blending. Frame blending tries to get rid of visual gaps in the movement of objects. If you ever drive at night you could see this effect in action when you move your eyes rapidly left to right and look at modern headlights, which often have strobing. This stroboscopic effect makes the movement of objects feel inconsistent by not being connected to each other and can even be distracting to some including me.
Frame blending can try to fix that by getting rid of these gaps. I made a youtube demo to show this in action here as well as the following very basic visual example:

There are many myths about motion blur because of bad implementations. Frame blending would not hinder gameplay in any significant fashion, cursor trail effects as they already exist in osu! are much more distracting than the proposition I am making here. This frame blending would actually work in a very similar way to cursor trails, without them being 10x too long and actually distracting.

Frame blending based motion blur would also not introduce any sort of input lag or similar, it simply works as a post processing effect.

Also, frame blending has more benefits on higher refresh rates, as the blurriness of it gets less the higher the refresh rate of the monitor is. So especially for people with high refresh monitors (240hz+) this feature would improve gameplay significantly.
By getting rid of gaps of the refresh rate the movement of the cursor would actually benefit by being more concise as distracting visual gaps would be removed to make the cursor movement more predictable.

Even Blur Busters have talked about this here, while the con is added motion blur, on higher refresh rates this is minimal to not noticeable.

So my proposition is to add frame blending to the cursor (this could be implemented similar to how cursor trails work, but better) as an option for people that are sensitive to stroboscopic effects to improve gameplay.

[Siiiuuuuu]

Is this the same thing im proposing here? #30975, or would this look a bit different?

[ItsPasi]

It's similar but at the same time quiet different since this doesn't function like a normal cursor trail. It blurs the cursor itself depending on the gap distance of the last 2 frames to avoid motion gaps. Also a cursor trail that doesn't produce gaps is already possible with certain tweaks, the main problem with trails imo is that you can't change the speed/length of the trail (how long it is visible). That could be an alternative to what I am suggesting.

For my suggestion though I made a quick video on how this would look in osu by recording the game at 500fps and then frame blending the footage down to 60fps:

blur.mp4

The video also shows that at 60fps it still looks quiet bad, this would improve massively at higher refresh rates (I think this is also why people hate motion blur, because it looks so bad a low refresh rates). When just blending the frames through a post processing filter this would look much cleaner than just recording higher fps footage like in the above video. Also there seems to be inconsistent gaps of the cursor in osu!lazer in general and I don't know why, might be an engine problem.

[peppy]

The only way this is happening is with special handling to the cursor. Rather than blur, it would be "continuity" that fills in the gaps / curve.

[ItsPasi]

What exactly do you mean with continuity? I am pretty sure that's what motion blur does (create continuity/smoothness) and I can't think of many other ways to create this effect except through "blur" or the existing cursor trails.
Although yes, the ingame implementation isn't technically the same thing as frame blending, and more of a blur that would need to take the velocity vector of the cursor and then duplicate the cursor (with a certain amount of samples) along that axis to fill in the gaps of the refresh rate/fps (I am bad at explaining but it goes in that direction). So yeah it would need special handling to the cursor.
And honestly any other solution that does create continuity like you said would work too, like said before adjustable cursor trail length could be an alternative. (I'm still biased towards my suggestion though😅)

[peppy]

I mean that the cursor trail would be a path instead of a series of individual circles.

[ItsPasi]

This would be great, that along with adjustable length of the trail would be awesome. (motionblur still better in my opinion since it could simulate infinite fps but I understand if that's not something you want to include)