[Bf-viewport] Temporal anti-aliasing for Eevee

[Corey Richardson]

Hi Clément ,

Sounds great! I can definitely start with FXAA. Where should this code go?
I guess maybe an effect in eevee? It's not (or shouldn't be) eevee-specific
at all, but I don't see what outside the engines or modes can add another
pass. It'd be nice if eg the manipulators were antialiased.

On Thu, Jun 8, 2017, at 19:07, Clément FOUCAULT wrote:
> Hello Corey,
> 
> Your contribution would be very helpful since I'm quite new to Temporal
> Anti-Aliasing.
> The AA listed in the planning is the TAA because I don't see how we could
> implement anything else (except from Super Sampling) that works for shading
> and other post processing (edge highlight).
> 
> My implementation idea was to have a Temporal Super Sampling (jittering the
> camera matrix) and using an accumulation buffer to progressively refine the
> whole viewport (so we are talking about the final frame all engines
> composited). And this only if scene is static (nothing moves). I'm
> restricting the context of application of this fullscreen TAA because we
> can't rely on depth buffer information at this point of the pipeline.
> 
> But for Eevee, a nice Temporal reprojection should be used because the
> depth buffer makes more sense in this context.
> 
> > 1. Would this contribution be welcome at this point?
> I'm pretty positive we have everything you need for you to start working on
> this. And I think there will be much conflict. So yeah get on board!
> 
> > 2. Are you sure you want to use TAA as it appears in UE4?
> Again I'm not well aware of the key difference (I read both presentation
> several times but still), Jimenez approach seems to leverage the power of
> compute shader (not in GL 3.3) and it seems quite difficult to implement
> without them. UE4 seems a bit simpler. Still we can reserve this
> implementation to hardware that supports it.
> 
> I think we should have a basic technique like FXAA or something around
> those line before trying TAA.
> 
> I'm hypersomniac on IRC if you want to get in touch!
> 
> Regards,
> Clément
> 
> 2017-06-08 12:52 GMT+02:00 Dalai Felinto <dfelinto at gmail.com>:
> 
> > Hi Corey,
> >
> > We have anti-alias planned as part of the Siggraph demo/deadline.
> > Which may need to be addressed before TAA.
> > Clément Foucault will be better equipped to address this and the
> > specifics of your email and should get back to you shortly.
> >
> > That said, your contribution will be most welcome, definitively.
> >
> > You can also find other tasks in the more recent roadmap we have for Eevee:
> > https://wiki.blender.org/index.php/Dev:2.8/Source/Viewport/Eevee/Roadmap-
> > MayAugust-2017
> >
> > Regards,
> > Dalai
> > --
> > blendernetwork.org/dalai-felinto
> > www.dalaifelinto.com
> >
> >
> > 2017-06-08 1:52 GMT+02:00 Corey Richardson <corey at octayn.net>:
> > > Greetings,
> > >
> > > I'm interested in working on TAA for eevee. I see it's on the wiki page
> > as
> > > "if we have time". I have a few questions:
> > >
> > > 1. Would this contribution be welcome at this point?
> > >
> > > I have a vague sketch of an idea of how to implement it, based on mostly
> > > [Karis2014], but also some other minor slide decks, but still some
> > thinking
> > > and looking at the draw engine code.
> > >
> > > 2. Are you sure you want to use TAA as it appears in UE4?
> > >
> > > "Filmic SMAA" [Jimenez2016] also looks really promising to me, and uses
> > > some of the same techniques. The big open question with it is the
> > feasibility of
> > > implementing it with GL 3.3.
> > >
> > > Let me know what you think!
> > >
> > > [Karis2014] - http://advances.realtimerendering.com/s2014/
> > epic/TemporalAA.pptx
> > > [Jimenez2016] - https://research.activision.
> > com/t5/Research-Papers/Filmic-SMAA-Sharp-Morphological-and-
> > Temporal-Antialiasing/ba-p/10012720
> > >
> > > --
> > > cmr
> > > http://octayn.net/
> > > +16038524272
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-- 
cmr
http://octayn.net/
+16038524272