Raytracing was merged into Dev-Rendering!

[LegendreVR]

@YuriyODonnell

Could you say if raytracing will be supported with VR in 4.22, or is that not planned for 4.22 and will only be possible in a later engine version?

I don't mean "will performance be good enough for VR", I mean "will it render correctly in VR, without any unusual artifacts".

+1 for VR rendering that works properly ! Performance can be tackled for 4.23 ;D

[Thomas Mayer]

For everyone still exploring this branch, RTGI has been officially checked into dev-rendering (yay!):

Ray tracing global illumination. Currently disabled by default to evaluate performance and quality in WoodChuck. r.RayTracing.GlobalIllumination (enables RTGI, default = 0) r.RayTracing.GlobalIllumination.Denoiser (enables denoising, default = 1) r.RayTracing.GlobalIllumination.SamplesPerPixel (determines samples-per-pixel, default = 1) r.RayTracing.GlobalIllumination.MaxBounces (determines maximum number of diffuse bounces, default = 1) r.RayTracing.GlobalIllumination.EvalSkyLight (determines whether or not SkyLight can be hit with indirect diffuse, default = 0) r.RayTracing.GlobalIllumination.MaxRayDistance (maximum ray distance for diffuse and visibility rays, default = 1.0e27) Details here: https://github.com/EpicGames/UnrealE...8819913010a6c0

Tommy.

[TommyBear]

For those still playing around with early raytracing stuff in dev-rendering, RTGI has been checked-in! Yay! :

Ray tracing global illumination. Currently disabled by default to evaluate performance and quality in WoodChuck.

r.RayTracing.GlobalIllumination (enables RTGI, default = 0)
r.RayTracing.GlobalIllumination.Denoiser (enables denoising, default = 1)
r.RayTracing.GlobalIllumination.SamplesPerPixel (determines samples-per-pixel, default = 1)
r.RayTracing.GlobalIllumination.MaxBounces (determines maximum number of diffuse bounces, default = 1)
r.RayTracing.GlobalIllumination.EvalSkyLight (determines whether or not SkyLight can be hit with indirect diffuse, default = 0)
r.RayTracing.GlobalIllumination.MaxRayDistance (maximum ray distance for diffuse and visibility rays, default = 1.0e27)

Details: https://github.com/EpicGames/UnrealE...8819913010a6c0

Tommy.

[noicevstime]

For those still playing around with early raytracing stuff in dev-rendering, RTGI has been checked-in! Yay! :

Ray tracing global illumination. Currently disabled by default to evaluate performance and quality in WoodChuck.

r.RayTracing.GlobalIllumination (enables RTGI, default = 0)
r.RayTracing.GlobalIllumination.Denoiser (enables denoising, default = 1)
r.RayTracing.GlobalIllumination.SamplesPerPixel (determines samples-per-pixel, default = 1)
r.RayTracing.GlobalIllumination.MaxBounces (determines maximum number of diffuse bounces, default = 1)
r.RayTracing.GlobalIllumination.EvalSkyLight (determines whether or not SkyLight can be hit with indirect diffuse, default = 0)
r.RayTracing.GlobalIllumination.MaxRayDistance (maximum ray distance for diffuse and visibility rays, default = 1.0e27)

Details: https://github.com/EpicGames/UnrealE...8819913010a6c0

Tommy.

Awesome! Thanks for the pointer.

[Jhosep_Chevarria]

Yeah, RTGI is here with us now ^_^

[Antidamage]

Is the denoiser not operating on RTGI? That looks worse than it did two weeks ago (but at the same time better! yay!)

[SilentAndAsleep]

Wow finally some fully real time GI! Great news. Do we need a rtx card if we only want to use RTGI? And is Windows 10 mandatory? I really don't want revert back to it, gave me way too much trouble with updates

[ZacD]

If UE4RT remains DXR, it'll definitely require Windows 10, blame Microsoft.

The RTX requirements could change, DXR technically supports most DX12 capable GPUs.

[Antidamage]

Going off Windows for RTX seems like a lot of pointless work. You'd have to be nuts to be pre-10 and running an RTX card for gaming.

I'm getting a long list of failures when I try to build ever since the other week. Anyone know what the log.txt thing is about? It's not permissions or dropbox, I think the UE build tool is blocking itself:

https://pastebin.com/KH1nRmx8

Also annoying, I definitely have .NET 4.6.2 installed:

1>C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\MSBuild\15.0\Bin\Microsoft.Common.CurrentVersion.targets(1179,5): error MSB3644: The reference assemblies for framework ".NETFramework,Version=v4.6.2" were not found.

[enoes]

Yeah, RTGI is here with us now ^_^

This is single bounce ?? Please try multi bounce

[SilentAndAsleep]

How's RTGI's performance compared to VXGI's on similar hardware? VXGI was really hungry but kinda usable for small scale games.

What worries me about RTGI is that next gen consoles might not be powerful enough to support DXR features, considering that the rtx gpu which is expensive as hell can struggle running the features. And how long until most PC gamers (not only the ones with super high end computers) can run it? Doesn't seem like a safe bet for a game to rely on RTGI just yet but I might be wrong.

[Jhosep_Chevarria]

Testing this very early integration of RTGI with different number of bounces with this simple scene (0, 1, 5 and 10). While more bounces, less fps, of course! (I'm happy with 1 bounce for now, GI from skylight will do the job).

[enoes]

Testing this very early integration of RTGI with different number of bounces with this simple scene (0, 1, 5 and 10). While more bounces, less fps, of course! (I'm happy with 1 bounce for now, GI from skylight will do the job).

Fps 1-5-10 bounce ? And your card ? Amazing thanks.

[Shirk]

It would be helpful for those posting pictures to also post their specs and fps in the scenes.

[Farshid]

why the noise is higher than vray interactive viewport or other render engines ?