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TAA - The Problem with UE5 and Modern Gaming

RymRym Member, Alpha Two
Greetings, fellow adventurers!

As we are approaching closer to the release of the Alpha 2 (copium), I have come across a peculiar but rather unavoidable thought regarding the graphical quality of the game.

In the past, games used to use AA solutions different from today. Today, the most widespread AA technique, and the most performance-friendly is probably TAA, which is also used for DLSS and, as far as I know, FSR and other upscaling methods.

TAA brings performance-friendly AA solutions to the table (for reference, TAA means Temporal Anti-Aliasing). I won't bother everyone with how TAA works or why it works like it does. What I want to bother everyone with is how it looks visually.

Due to how TAA works, it has a very powerful negative effect on the experience of the majority of players, this negative effect is called blur.

In short, TAA permanently introduces a blur effect to the image. As a real life example, someone who needs glasses to see well can perfectly understand the blur I speak of.

For example you look at a tree, and you take your glasses off, and something is off, the tree looks blurry, without detail, you can't quite focus on it properly. You put your glasses on and voilla, the tree looks lovely, with details and you can properly focus on it.

This is basically what TAA does to a game, it "blurs" together frames to eliminate aliasing. Good examples can be seen in Red Dead Redemption 2 and the Black Myth Wukong benchmark tool available for free on steam.

Enter: The Solution

There are 2 main solutions to TAA from the perspective of the player, both are brute-force. Higher resolutions reduce the blur effects of TAA. In fact, higher PPI brute-forces TAA into looking clear and sharp.

Of course, only the top most expensive gaming rigs can even run the high resolution required for TAA to look good. You either use a 1440p screen to brute-force a 4K image with the use of super resolution tech (such as DLDSR) or you outright use a 4K native screen.

Most people use 1080p, 57% in fact going by the steam results, while 20% use 1440p, only 3.6% of gamers use 4K and for good reason. 4K looks great, but is extremely difficult to run.


From the perspective of the developer, TAA can be optimized so that, put frankly, it doesn't make the game look like a smeared mess of blur where you can't make out details farther away than 2 meters in front of your character. I will give again the example of Black Myth Wukong which even at 4K does not look great, and it's the same UE5 engine Ashes will run on, the difference being different optimizations as we're talking different games.


I'm writing this post more or less to bring it to the attention of the developers in case they don't already know of the issues that TAA implements. If possible, I would check with a native 1080p and 1440p screen to make sure the game looks acceptable at those resolutions, this is because, again, TAA negatively impacts player experience the most at 1080p and 1440p. I don't want the game to end up being a shimmery, smeary, blurry mess due to this blessing-curse we have that is called TAA.

(Note that disabling TAA as the player more often than not breaks game engines entirely and makes the aliasing explode into a shimmery mess, so you can't just disable it and use FXAA or MSAA or other methods. Also, DLSS and DLAA use TAA to work well, so they don't disable it either as far as I know).

All in all, TAA is an amazing solution for performance-friendly AA, but if optimized poorly or wrong it can destroy the experience entirely, so it's the most double-edged sword of AA solutions there is atm, as far as I know at least.

For players interested in how TAA behaves visually, I urge you to try out the free Black Myth Wukong benchmark tool from Steam at 1080p and 1440p. If you happen to notice even at max settings that the image looks off or blurry, that's because of how TAA works. Tbh, 4K does not fare much better either in this test so it's rather extreme but a good example nonetheless.
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Comments

  • TryolTryol Member, Braver of Worlds, Kickstarter, Alpha One, Alpha Two, Early Alpha Two
    This is a really important issue that definitely needs to be talked about.
    I think adding a few pictures about how bad TAA can look from the showcase streams in the OP would make even less tech-savvy people interested, that way this could gain more traction.
  • patrick68794patrick68794 Member, Alpha Two
    This is what the Black Myth Wukong benchmark looks like at native 4K:

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  • LukiLulupedLukiLuluped Member, Alpha One, Alpha Two, Early Alpha Two
    Very well said and explained. All UE5 games, with 1-2 exceptions that I played have this problem, and it's bad.
    Black Myth Wukong looks amazing in videos and on streams but when you actually play it, it's really blurry. Games from 10-15 years ago look more crips and have better visibility than current games. I really really hope that ashes will not be a blurry mess, because in Alpha 1 when it ran on unreal engine 4 it was fantastic.
  • CaerylCaeryl Member, Alpha Two, Early Alpha Two
    Yowch, hopefully that's adjusted well in advance. Constant blur can cause eye strain real quick
  • DygzDygz Member, Braver of Worlds, Kickstarter, Alpha One, Alpha Two, Early Alpha Two
    Ashes will have been upgraded to UE6 by the time it releases.
  • nanfoodlenanfoodle Member, Founder, Kickstarter, Alpha Two, Early Alpha Two
    Dygz wrote: »
    Ashes will have been upgraded to UE6 by the time it releases.

    They do have plans to upgrade to 5.4 during A2. Or you joking we will be waiting another 5-6 years for this game to release? :P
  • P0GG0P0GG0 Member, Alpha Two
    reshade app has fixed a ton of my dislikes in previous games.
  • AszkalonAszkalon Member, Alpha Two
    Caeryl wrote: »
    Yowch, hopefully that's adjusted well in advance. Constant blur can cause eye strain real quick

    A.M.E.N. to that !!! (>.<)
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    ✓ Occasional Roleplayer
    ✓ Currently no guild !! (o_o)
  • I doubt much can change as AoC uses a lot of vegetation. The only thing they can do is to play with tonemapper sharpen, or modified TAA code values.
    A post i liked in the past in UE forum:
    https://www.youtube.com/watch?v=6aGasGgrvoI
    https://forums.unrealengine.com/t/sharp-temporal-aa/82900/39
  • I always find it so embarrassing when modern games look worse than PS2 games because the antialiasing method can't handle the details. We get it, you optimised for 8k, but couldn't you devote the tiniest bit of your budget to making the game render properly on a normal person's screen?

    I think there's a decent chance that developers for games like Wukong might be incentivised to make their games actively render like shit for anything below a 4070 because they're partnered with NVIDIA? But performance-minded studios making online games shouldn't run into the same issues.
    The only one who can validate you for all the posts you didn't write is you.
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  • TorsteinTorstein Member, Leader of Men, Kickstarter, Alpha One, Alpha Two, Early Alpha Two
    After playing A2, I have to say that the current state of the TAA/DLSS/FSR is extremely blurry, hope they can let us disable it.
  • RymRym Member, Alpha Two
    Same, I may do a comparison between 1440p native and 4K DLDSR this weekend if we won't get DDoS'd again.
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  • malkrazmalkraz Member, Alpha Two
    Intrepid needs to address this
  • RymRym Member, Alpha Two
    I fixed it by going to 8K resolution.
    787m8dm96z5g.gif
  • GreatPhilisopherGreatPhilisopher Member, Alpha Two
    yea they need to fix that , game is pretty damn blurry and no setting fixes it
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  • TheDarkSorcererTheDarkSorcerer Member, Alpha Two
    I just watched the Asmon video. TAA looks horrible indeed and explain why the game look the way it does. The game looked better before they introduce UE5.
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  • TheDarkSorcererTheDarkSorcerer Member, Alpha Two
    P0GG0 wrote: »
    reshade app has fixed a ton of my dislikes in previous games.

    That's great and all. But if users feel the need to change the look of the game the way it wasn't intended to make it look better, it is a poor product.
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