5 ms·

No, it's using the newish SSGI and TRAA webgpu nodes. The three team has been making great progress with SSGI and webgpu in general and i'd recommend checking i

by h4ch1 7mo ago

No, it's using the newish SSGI and TRAA webgpu nodes. The three team has been making great progress with SSGI and webgpu in general and i'd recommend checking it out if you're interested. There's also a denoise node in three (not used in this example), but SSGI still looks kinda blurry. Work though is still going on: https://github.com/mrdoob/three.js/issues/31892 https://github.com/mrdoob/three.js/issues/31892

Sharlin 7mo ago
Jesus Christ, trying to figure out what TRAA is (presumably an anti-aliasing algorithm) and how it works and it's entirely impossible to google.
- menno-sh 7mo ago
  Temporal reprojection anti aliasing :) https://www.threejs-blocks.com/docs/traaHD https://www.threejs-blocks.com/docs/traaHD
  - Sharlin 7mo ago
    The only thing even remotely related to graphics I found was references to "TrAA" in forum posts from 2006 (yeah) where I believe they referred to NVIDIA "Transparency AA" or something like that. "TRAA", "TRAA meaning", "TRAA graphics", "TRAA 3D" all gave fully irrelevant results :D
    - jldugger 7mo ago
      If you make the assumption that "AA" is some form of antialiasing, it's not too bad: first scholar[1] hit expands the acronym to Temporal Reprojection Anti-Aliasing [1]: https://scholar.google.com/scholar?hl=en&as_sdt=0%2C5&q=traa+anti+aliasing&btnG=
      - Sharlin 7mo ago
        Yeah, should've tried with "antialiasing". Still, astonishingly obscure given that it's not even a new thing anymore and apparently implemented in UE4 and others.
- h4ch1 7mo ago
  TRAA basically works by using a history buffer, for example using the last couple of frames, all jittered a little bit to compute the pixel. There's still ghosting and smearing that can happen though because of this technique, so you have methods to counteract like subpixel correction where u increase temporal alpha when velocity is subpixel, but that can introduce some artifacts as well. There's also SMAA T2x which the pmndrs team is planning on integrating into their postprocessing package[0]. This cryengine3 slideshow gives a nice overview of antialiasing methods if you're interested: http://iryoku.com/aacourse/downloads/13-Anti-Aliasing-Methods-in-CryENGINE-3.pdf http://iryoku.com/aacourse/downloads/13-Anti-Aliasing-Method... [0] https://github.com/pmndrs/postprocessing https://github.com/pmndrs/postprocessing This paper also provides a decent overview of TRAA: https://fileadmin.cs.lth.se/cs/Education/EDAN35/projects/17Christian_TRAA.pdf https://fileadmin.cs.lth.se/cs/Education/EDAN35/projects/17C...
- nilkn 7mo ago
  The free Google AI mode got it for me on the first try by just pasting in the comment and asking what TRAA was in that context.

by h4ch1 7mo ago

Sharlin 7mo ago

Jesus Christ, trying to figure out what TRAA is (presumably an anti-aliasing algorithm) and how it works and it's entirely impossible to google.

menno-sh 7mo ago
Temporal reprojection anti aliasing :) https://www.threejs-blocks.com/docs/traaHD https://www.threejs-blocks.com/docs/traaHD
- Sharlin 7mo ago
  The only thing even remotely related to graphics I found was references to "TrAA" in forum posts from 2006 (yeah) where I believe they referred to NVIDIA "Transparency AA" or something like that. "TRAA", "TRAA meaning", "TRAA graphics", "TRAA 3D" all gave fully irrelevant results :D
  - jldugger 7mo ago
    If you make the assumption that "AA" is some form of antialiasing, it's not too bad: first scholar[1] hit expands the acronym to Temporal Reprojection Anti-Aliasing [1]: https://scholar.google.com/scholar?hl=en&as_sdt=0%2C5&q=traa+anti+aliasing&btnG=
    - Sharlin 7mo ago
      Yeah, should've tried with "antialiasing". Still, astonishingly obscure given that it's not even a new thing anymore and apparently implemented in UE4 and others.
h4ch1 7mo ago
TRAA basically works by using a history buffer, for example using the last couple of frames, all jittered a little bit to compute the pixel. There's still ghosting and smearing that can happen though because of this technique, so you have methods to counteract like subpixel correction where u increase temporal alpha when velocity is subpixel, but that can introduce some artifacts as well. There's also SMAA T2x which the pmndrs team is planning on integrating into their postprocessing package[0]. This cryengine3 slideshow gives a nice overview of antialiasing methods if you're interested: http://iryoku.com/aacourse/downloads/13-Anti-Aliasing-Methods-in-CryENGINE-3.pdf http://iryoku.com/aacourse/downloads/13-Anti-Aliasing-Method... [0] https://github.com/pmndrs/postprocessing https://github.com/pmndrs/postprocessing This paper also provides a decent overview of TRAA: https://fileadmin.cs.lth.se/cs/Education/EDAN35/projects/17Christian_TRAA.pdf https://fileadmin.cs.lth.se/cs/Education/EDAN35/projects/17C...
nilkn 7mo ago
The free Google AI mode got it for me on the first try by just pasting in the comment and asking what TRAA was in that context.