• Hey, guest user. Hope you're enjoying NeoGAF! Have you considered registering for an account? Come join us and add your take to the daily discourse.
  • The Politics forum has been nuked. Please do not bring political discussion to the rest of the site, or you will be removed. Thanks.

Fortnite's Raytraced GI and AO in a nutshell

Dampf

Member
Jun 28, 2020
510
1,076
480
RT GI low/ RT AO Medium




RT GI and RT AO off

What is going on here? Why is the GI and AO so bad? The shed lighting looks completely flat and unrealistic with GI on, as there's not much light entering it. Looks much better with RT GI off. The AO does nothing in this game, look how flat the shed appears on the ground or how flat the grass is, regardless if RT AO is on or off, same applies for any small objects on the ground, they appear completely flat.

And then there's the framerate impact. Like holy shit, I have tested Metros GI that costs nothing compared to this and does a much better job. Or the one in Ring of Elysium that runs even faster than the pre-baked GI and looks ten times better.

UE4 games always have crappy RT implementations, but Fortnite is the king, easily. Never seen such a badly done RT implementation in my life. The reflections are nice, but performance varies geatly.

Look how bad the framerate impact is on a 3070, going from 166 FPS at 1080p to 1080p 44 FPS with RTX on:

It seems sad to me that this is supposed to be the engine's showcase for new tech...
 
Last edited:

Dampf

Member
Jun 28, 2020
510
1,076
480
If you telling me RT off picture is RT on I would believe you .
Yeah if it wasn't for the framerate counter, I could easily see myself switching the pictures. The pre-baked GI looks much better.
 
Last edited:

lyan

Member
May 21, 2017
412
337
375
Looks reasonable to me. I mean real life doesn't automatically look good, even in basic scenes film production and professional photographers often have plenty of complexly directed lights setup outside of the view frustum to make the final picture look acceptable.
 

DemonCleaner

Member
Jun 11, 2004
2,114
1,241
1,725
well it shows that you can't just stick realtime GI on a no realtime solution and expect it to look good anywhere in the game. you basically would have to author your lightning twice in the art pipeline. that obviously won't be happening in existing games.
 

VFXVeteran

Professional Victim (Vetted)
Nov 5, 2019
5,460
12,417
805
RT GI low/ RT AO Medium




RT GI and RT AO off

What is going on here? Why is the GI and AO so bad? The shed lighting looks completely flat and unrealistic with GI on, as there's not much light entering it. Looks much better with RT GI off. The AO does nothing in this game, look how flat the shed appears on the ground or how flat the grass is, regardless if RT AO is on or off, same applies for any small objects on the ground, they appear completely flat.

Are you for real?

The RTX off in the shed looks completely wrong! Why would you see the sky color in the shed when the ceiling of the shed is blocking the sky?? Where is "flat" in the RTX On? There is shadowing everywhere to make it look solid. Go open your front door to your house and walk outside of your house, turn around and look inside of it.. tell me how much light is shining inside your house from the outside sky and sun and ignoring all the shadows produced by all the objects in your house including the roof.

People are literally used to completely WRONG rendering and call the correct rendering wrong?? WTF??
 
Last edited:

-Arcadia-

Banned
Aug 20, 2019
9,661
33,487
910
Are you for real?

The RTX off in the shed looks completely wrong! Why would you see the sky color in the shed when the ceiling of the shed is blocking the sky?? Where is "flat" in the RTX On? There is shadowing everywhere to make it look solid. Go open your front door to your house and walk outside of your house, turn around and look inside of it.. tell me how much light is shining inside your house from the outside sky and sun and ignoring all the shadows produced by all the objects in your house including the roof.

People are literally used to completely WRONG rendering and call the correct rendering wrong?? WTF??

I can see your point.

Probably comes down to one looking better and offering more contrast, even if it’s not accurate. More realistic /= more visually appealing, which is a fascinating thing to see happening.
 

dvdvideo

Member
Sep 15, 2005
2,456
2,489
1,680
Since the next gen consoles play this at 4k 60 with rt on, does this mean now they are just as good as a 3070 instead of a 2060 as per watchdogs? I mean if we are going to judge by one game......
 

Shmunter

Member
Aug 25, 2018
9,786
22,475
775
Just like in movies, realistic lighting is not automatically better than stylized considered lighting. Fake artistic use of lighting for higher impact is standard in media.

In games, yes, you lose dynamic flexibility if pre-baked - so the scene cannot change automatically based on inputs. BUT until we get more world simulation, physic, destruction, etc. it's usefulness can be a detriment to the visuals.
 

Danny Dudekisser

I paid good money for this Dynex!
Oct 13, 2008
21,069
8,562
1,480
Lol, wow. I actually thought the "RT off" picture was the one with RT on. Great tech showcase, Epic.
 

VFXVeteran

Professional Victim (Vetted)
Nov 5, 2019
5,460
12,417
805
  • Empathy
Reactions: VlaudTheImpaler

Stuart360

Member
Sep 9, 2018
9,486
22,470
730
Havent watched the vid, but the top picture looks way better to me, whichever one it is.
 

VFXVeteran

Professional Victim (Vetted)
Nov 5, 2019
5,460
12,417
805
Its a snarky way of saying it just looks like brighter garbage. Im sorry, but light doesnt bend around and fully illuminate creepy barn corners.

But that's with RT off. I think you got it switched.
 
Jul 25, 2014
1,207
548
590
Uhh, add me to the crowd that initially thought of the 2nd pic having RTGI and RTAO ON, haven't watched the video yet. Check out the AO in the background on the foliage.

Could be the artstyle or maybe it looks better in motion, but these shots sure don't show an uplift in detail. Reminded me of MW's RT screencaps on Nvidia's blog for their PR materials for RTX, the rasterized ones being better.

Will watch the video now.
 

Dampf

Member
Jun 28, 2020
510
1,076
480
Are you for real?

The RTX off in the shed looks completely wrong! Why would you see the sky color in the shed when the ceiling of the shed is blocking the sky?? Where is "flat" in the RTX On? There is shadowing everywhere to make it look solid. Go open your front door to your house and walk outside of your house, turn around and look inside of it.. tell me how much light is shining inside your house from the outside sky and sun and ignoring all the shadows produced by all the objects in your house including the roof.

People are literally used to completely WRONG rendering and call the correct rendering wrong?? WTF??


The second Screenshot, the one with the darker shadowing, is RT off not on, look at the Framerate. The implementation in this game is clearly broken.

I know a good implementation of RT when I see one. Metro has superb GI which makes a dramatic difference.

This thread is not against RT im absolutely obsessed with RT just like you. This thread is against the poor implementation of Raytracing in this game and in UE4 which sheds a bad light (hehe) on raytracing in general.

But that's with RT off. I think you got it switched.

Nope, you got it switched. The one with the flat looking, bright shed interior, the first screenshot, is RT GI on. Again, look at the framerate.

Your little rant was for nothing lol


Why are you showcasing the Low and Medium settings for the RTX?

Cuz there's not much difference to Ultra.
 
Last edited:

Dibils2k

Member
Mar 22, 2015
1,661
2,499
665
its really triggering me that you start the first image with the label above the image, then for the rest you put it under the image! WHYYYYYYY!
 
  • LOL
Reactions: Dampf

TonyK

Member
Aug 13, 2020
907
1,467
400
Are you for real?

The RTX off in the shed looks completely wrong! Why would you see the sky color in the shed when the ceiling of the shed is blocking the sky?? Where is "flat" in the RTX On? There is shadowing everywhere to make it look solid. Go open your front door to your house and walk outside of your house, turn around and look inside of it.. tell me how much light is shining inside your house from the outside sky and sun and ignoring all the shadows produced by all the objects in your house including the roof.

People are literally used to completely WRONG rendering and call the correct rendering wrong?? WTF??
Light is not bouncing properly in any of those screenshots. Inner building has a irreal blue tint in both (blue shadows are related to sky). Light bounced from lighted floor (warm light) will remove that blue tint in the parts where light bounces because they have different temperatures, so the result should be grayish.

In resume: both are fake AF. So better to choose the one with better framerate.
 

bitbydeath

Member
Nov 25, 2015
15,154
26,064
1,200
Why are you showing pictures of a barn and not something more interesting to show off RT?
 

Mister Wolf

Member
Sep 21, 2014
7,239
9,588
810
The second Screenshot, the one with the darker shadowing, is RT off not on, look at the Framerate. The implementation in this game is clearly broken.

I know a good implementation of RT when I see one. Metro has superb GI which makes a dramatic difference.

This thread is not against RT im absolutely obsessed with RT just like you. This thread is against the poor implementation of Raytracing in this game and in UE4 which sheds a bad light (hehe) on raytracing in general.



Nope, you got it switched. The one with the flat looking, bright shed interior, the first screenshot, is RT GI on. Again, look at the framerate.

Your little rant was for nothing lol




Cuz there's not much difference to Ultra.

So use Ultra then.
 
Last edited:

Dampf

Member
Jun 28, 2020
510
1,076
480
So use Ultra then.
Most of the time, Ultra RT is a pure waste of resources and Medium or High look equally good in most cases. As long as RT is on, it makes a huge difference. So I will continue using medium/high RT settings.
 
  • Like
Reactions: Rikkori

VFXVeteran

Professional Victim (Vetted)
Nov 5, 2019
5,460
12,417
805
The second Screenshot, the one with the darker shadowing, is RT off not on, look at the Framerate. The implementation in this game is clearly broken.

I know a good implementation of RT when I see one. Metro has superb GI which makes a dramatic difference.

This thread is not against RT im absolutely obsessed with RT just like you. This thread is against the poor implementation of Raytracing in this game and in UE4 which sheds a bad light (hehe) on raytracing in general.

Nope, you got it switched. The one with the flat looking, bright shed interior, the first screenshot, is RT GI on. Again, look at the framerate.

Your little rant was for nothing lol

I see what happened here. My bad. That's a terrible implementation of RTX. It's not casting enough AO rays and not attenuating enough bounced rays from the sky but the ceiling is broken through. I didn't notice that at first.
 
Last edited:
  • Like
Reactions: Dampf