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Why is Temporal AA texture blurring on movement?

A number of other AnswerHub questions seem to be related to this issue, but are there plans to allow users modify the Temporal AA settings to reduce the blurring of textures that occurs after motion?

Such as the ability to reduce the amount of frames that are sampled (in an attempt to force a faster convergence, so that there isn't a noticeable half second delay after movement stops where textures go from blurry to highly detailed?) Perhaps this would result in worse AA but quicker collection times and thus less of a noticeable "eyes-focusing" effect?

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asked May 02 '14 at 02:22 AM in Rendering

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Cidubic
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avatar image Cidubic May 08 '14 at 05:07 PM

Anyone? No one?

avatar image Daphnis26 May 08 '14 at 05:24 PM

I know what you're talking about and would love to see this addressed as well.

avatar image tmek May 08 '14 at 05:49 PM

Is this in the context of wearing an Oculus Rift or a normal monitor? I've never noticed any major issues on just a normal monitor with TXAA.

Could you give a simple to create scenario that demonstrates what you're talking about?

avatar image Cidubic May 08 '14 at 10:12 PM

I believe that it's most noticeable on meshes with fine details, I've tested with both a normal map on and off to see if their was any difference but both with and without a normal map the TXAA blurring occurs.

For a test I'd say create a model (the model I first noticed it on was a about 2 meters high and a 3/4 meter wide) with a texture that has small details so on a 512 map 1-5+ pixels wide (with anti-aliasing in my case) and then put it in the basic scene, then move the camera back and forth while looking at the model (as if you're walking towards and then away while looking at it).

You should see the model's texture blurring out when you move (which is acceptable since it's basically motion blur) and then when you stop it should take 0.2 to 0.5(ish) seconds for the texture to go from blurry soup to crisp again, which in my opinion is just a little bit too long, since it adds an artificial eye-refocusing feeling.

You won't notice this effect very much on things with uniform textures or things without fairly fine details / small spotted patterns with differing colors.

avatar image reedandrader Aug 12 '14 at 11:00 PM

I've has to turn off temporal AA for FXAA because of the texture smushing.

avatar image Slavq Sep 02 '16 at 11:17 AM

2 years later and I have the same problem (texture blurring when moving) and I've switched to FXAA for now... Is it still the only solution?

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