Raytracing was merged into Dev-Rendering!

[OwenWP]

If we are talking about real world game development, path tracing is out of the question to begin with. Game development is all about trading generality for quality. Artists decide what part of the scene is important, and fake the rest.

[Antidamage (Addie)]

OwenWP: That is what we’re talking about, we’re on the unreal engine forums. The premise I’m trying to defeat is that all the examples of realtime caustics from Nvidia so far are path traced and accurate rather than artistic tricks.

While not tracing through translucency, here are some realtime raytraced caustics from a recent NVidia demo using RTX:

Let’s be totally clear: the ray did not come from the camera, hit the water, become a caustic ray and hit the bridge. The path from the light source also didn’t hit the water and scatter a hundred new samples on to the bridge causing interference patterns. What happened is that someone wrote an emissive light texture function using the same function that the water is using to create waves. You can actually see the loss of detail in the expansion of the projection since whatever denoiser they’re using hasn’t been trained on that function. Classic sign of a procedural texture.

If Nvidia had real time caustics approaching path tracing quality they’d be waving it in our faces and calling it a unified solution rather than demoing shadows and reflections and caustics tricks.

I’m all for this generation of DXR enabled graphics, but let’s be realistic. We have the main three things we expected: reflections, shadows and first, maybe second bounce GI. Anything else is going to need to use machine learning. We should be extremely grateful that Epic is way ahead of the curve in giving us GI already as nobody else seems to have it figured out.

[Antidamage (Addie)]

I had no idea you worked on this demo! Do you have a copy I could download somewhere? I’d love to take a look myself.

I didn’t work on it, it’s just obvious how it was made and how it could be improved. It’s not the best looking demo, not when you put it side by side with what UE can already do with raytracing combined with a proper graphics engine.

We prefer GI set to 4 bounces. It looks great and together with a high sample count we get decent results for our use case.

Slow as hell though. That won’t be useful in a game when it’s running at less than 12fps, unless you’ve had some wildly different experience with it? Surely you wouldn’t want your sample count above 1 for the same reason.

[Antidamage (Addie)]

You’re not on the same page as everyone else then. You’re arguing for the inclusion of real-time caustics using techniques that won’t work on consumer level hardware (and I’m skeptical that they’re any good on your Quadro or whatever too) and if you’re using that kind of hardware then you probably don’t want “good enough” caustics either, unless you’re making a disney ride or something where the budget is effectively unlimited and the number of installs is one.

Everyone seems to want UE to be an offline renderer as well, but it might be a case of having a hammer and wishing every problem was a nail. I’m all for it if they want to do it, but there are far better animation and rendering solutions out there but it’s just that as developers we’re unlikely to be familiar with them.

[Rawalanche]

Caustics are extremely tough problem to solve even in offline rendering, where you expect over an hour to render a single frame. I’d be very surprised if any form of non-fake and at least somewhat physically plausible caustics were possible to render in real-time for practical use in games within the next 10 years or so

[Antidamage (Addie)]

Thread looks weird with all those posts deleted. Should have left them for coherence at least.

[TommyBear]

@Nocturness

https://youtube.com/watch?v=U02Y45NYNWg

Global Illumination Samples 10
Bounce 2
Denoiser Deactivated.
EvalSkylight Activated.
Ray Distance Default.

RTX 2080ti

Great video!

[Nigkdo]

Hi everybody.

I finally get to try UE4 raytracing. RTGI is not flawless, but still awesome! Thanks to all developers!

UE4 Raytracing test (4.22 preview 2)

[Antidamage (Addie)]

@Nigkdo

Hi everybody.

I finally get to try UE4 raytracing. RTGI is not flawless, but still awesome! Thanks to all developers!

https://www.youtube.com/watch?v=W3-rlFOcHSw

That is awesome! The GI is looking WAY better too.

[Bladerskb]

has this been posted?

https://youtube.com/watch?v=RisKIVwQjTs](https://www.youtube.com/watch?v=RisKIVwQjTs)

[DCrosby]

My interest had peeked ever since I saw the demo @ GDC last year, and I wasn’t intimidated in building my own UE4 engine from source, so I started playing around. And these are the results. I was thinking in releasing this as a standalone exe, so that people who have a brand new RTX capable could have some eye candy to look at. It would require some cleanup of the collision around the car, so you can’t fall off etc… but could be cool.

Initially I wanted to make a “turntable” like at a car show, and pull the sheet off the car, and then I thought, that’s not really a feat. And then my mind wandered and I thought, “Turntable” a DJ Turntable presents itself with a lot of cool knobs, and reflections off the glass. I’m also a huge fan of 60-80’s neon signs, and this became the vision, and here’s the result. All RTX Rendered @ 4K, no down-sample, and ran in 1080 @ 50 FPS.

Unreal Engine RTX Rendering of DeTomaso Pantera

[Chesire]

@DCrosby

Turntable presents itself with a lot of cool knobs, and reflections off the glass.

Any pointers how to get RT translucency working outside of the editor window? My glass fails to render when playing a level, no matter the mode.

[DCrosby]

Hi, Chesire, I believe I turned on r.raytracing.reflections 3 or 2 since that then looks at ray bounces, you may have to turn on de-noisers, as just reflections tend to be noisy, also 1 bounce may not be enough to get through the glass.

I also created a method (Function), which can be triggered via an actor blueprint to set things for both the renderer and the editor, if you hook it both inot the construction script as well as the event graph. I used this to get consistant renders, so that if I suffered a crash I had the values stored in the BP

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String",PinType.PinCategory="string",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="r.AmbientOcclusion.Compute",PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=4539796141099B86856BBDA0C2B7BEEC,PinName="State",PinToolTip="State
Boolean",PinType.PinCategory="bool",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="false",AutogeneratedDefaultValue="false",LinkedTo=(K2Node_VariableGet_9 060A054B496459569407D3823ADADE08,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
End Object
Begin Object Class=/Script/BlueprintGraph.K2Node_VariableGet Name="K2Node_VariableGet_9"
   VariableReference=(MemberName="AmbientOcclusion",MemberGuid=761F53E54156FE812574D4A20E652CD9,bSelfContext=True)
   NodePosX=-138
   NodePosY=856
   NodeGuid=C03E853B46F4AD240AC29C8BA053ACA5
   CustomProperties Pin (PinId=060A054B496459569407D3823ADADE08,PinName="AmbientOcclusion",Direction="EGPD_Output",PinType.PinCategory="bool",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="false",AutogeneratedDefaultValue="false",LinkedTo=(K2Node_CallFunction_1 4539796141099B86856BBDA0C2B7BEEC,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=8165D3B04914FAA4B1FCEA925E7F3D8C,PinName="self",PinFriendlyName=NSLOCTEXT("K2Node", "Target", "Target"),PinType.PinCategory="object",PinType.PinSubCategory="",PinType.PinSubCategoryObject=BlueprintGeneratedClass'"/Game/Blueprints/Raytracing_Controller.Raytracing_Controller_C"',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=True,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
End Object
Begin Object Class=/Script/BlueprintGraph.K2Node_CallFunction Name="K2Node_CallFunction_7"
   FunctionReference=(MemberName="SetCVAR_Bool",MemberGuid=C7561D0D45F0FF5A46D318A7D842B3B6,bSelfContext=True)
   NodePosX=165
   NodePosY=976
   NodeGuid=A64FFA9E41015ACB5210F393BE8ECCCD
   CustomProperties Pin (PinId=F89FFE2143CF7EDC0FC2B983FA0EB45F,PinName="execute",PinToolTip="
Exec",PinType.PinCategory="exec",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(K2Node_CallFunction_1 14D1F92B408C9CDE0C936E9742EE68FA,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=7499A13C4901CBC7D65C3BB676E102F8,PinName="then",PinToolTip="
Exec",Direction="EGPD_Output",PinType.PinCategory="exec",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(K2Node_CallFunction_13 F89FFE2143CF7EDC0FC2B983FA0EB45F,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=95F90C1A4218DB1375E3A09BAB6B327F,PinName="self",PinFriendlyName=NSLOCTEXT("K2Node", "Target", "Target"),PinToolTip="Target
Self Object Reference",PinType.PinCategory="object",PinType.PinSubCategory="self",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=541A0CAF486A9BF628A63DA359B1A437,PinName="CVar",PinToolTip="CVar
String",PinType.PinCategory="string",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="r.RayTracing.GlobalIllumination",PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=1DB5EC474A7E87E107987EB5179EB76F,PinName="State",PinToolTip="State
Boolean",PinType.PinCategory="bool",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="false",AutogeneratedDefaultValue="false",LinkedTo=(K2Node_VariableGet_11 537C0C364E7C5F24AFCA0BBD60B47B63,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
End Object
Begin Object Class=/Script/BlueprintGraph.K2Node_VariableGet Name="K2Node_VariableGet_11"
   VariableReference=(MemberName="GlobalIllumination",MemberGuid=F72D4DCE443BB261BA667B8BEECDC4B9,bSelfContext=True)
   NodePosX=-96
   NodePosY=1104
   NodeGuid=1125D5284B8C2E37AB817A9A7F9E8D13
   CustomProperties Pin (PinId=537C0C364E7C5F24AFCA0BBD60B47B63,PinName="GlobalIllumination",Direction="EGPD_Output",PinType.PinCategory="bool",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="false",AutogeneratedDefaultValue="false",LinkedTo=(K2Node_CallFunction_7 1DB5EC474A7E87E107987EB5179EB76F,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=E085A9D041DDF608CE8ABFB2778E9218,PinName="self",PinFriendlyName=NSLOCTEXT("K2Node", "Target", "Target"),PinType.PinCategory="object",PinType.PinSubCategory="",PinType.PinSubCategoryObject=BlueprintGeneratedClass'"/Game/Blueprints/Raytracing_Controller.Raytracing_Controller_C"',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=True,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
End Object
Begin Object Class=/Script/BlueprintGraph.K2Node_CallFunction Name="K2Node_CallFunction_13"
   FunctionReference=(MemberName="SetCVAR_Bool",MemberGuid=C7561D0D45F0FF5A46D318A7D842B3B6,bSelfContext=True)
   NodePosX=176
   NodePosY=1200
   NodeGuid=3E7BE6F14527E5E6FDF0FFB8F0C93793
   CustomProperties Pin (PinId=F89FFE2143CF7EDC0FC2B983FA0EB45F,PinName="execute",PinToolTip="
Exec",PinType.PinCategory="exec",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(K2Node_CallFunction_7 7499A13C4901CBC7D65C3BB676E102F8,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=7499A13C4901CBC7D65C3BB676E102F8,PinName="then",PinToolTip="
Exec",Direction="EGPD_Output",PinType.PinCategory="exec",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(K2Node_CallFunction_12 FF032D164C72EFB1F09E80B47743490F,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=95F90C1A4218DB1375E3A09BAB6B327F,PinName="self",PinFriendlyName=NSLOCTEXT("K2Node", "Target", "Target"),PinToolTip="Target
Self Object Reference",PinType.PinCategory="object",PinType.PinSubCategory="self",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=541A0CAF486A9BF628A63DA359B1A437,PinName="CVar",PinToolTip="CVar
String",PinType.PinCategory="string",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="r.Reflections.Denoiser",PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=1DB5EC474A7E87E107987EB5179EB76F,PinName="State",PinToolTip="State
Boolean",PinType.PinCategory="bool",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="false",AutogeneratedDefaultValue="false",LinkedTo=(K2Node_VariableGet_13 FDAF0B6D42120853AC5E7D93C50CF241,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
End Object
Begin Object Class=/Script/BlueprintGraph.K2Node_VariableGet Name="K2Node_VariableGet_13"
   VariableReference=(MemberName="ReflectionDenoiser",MemberGuid=9EC086C543BAF17E079EDEB2D6EFAC9F,bSelfContext=True)
   NodePosX=-16
   NodePosY=1344
   NodeGuid=625F573D404A1A5A9D2E10AB14E75407
   CustomProperties Pin (PinId=FDAF0B6D42120853AC5E7D93C50CF241,PinName="ReflectionDenoiser",Direction="EGPD_Output",PinType.PinCategory="bool",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="false",AutogeneratedDefaultValue="false",LinkedTo=(K2Node_CallFunction_13 1DB5EC474A7E87E107987EB5179EB76F,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=008AA4F1456F3F93E6F2898E1D050012,PinName="self",PinFriendlyName=NSLOCTEXT("K2Node", "Target", "Target"),PinType.PinCategory="object",PinType.PinSubCategory="",PinType.PinSubCategoryObject=BlueprintGeneratedClass'"/Game/Blueprints/Raytracing_Controller.Raytracing_Controller_C"',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=True,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
End Object
Begin Object Class=/Script/BlueprintGraph.K2Node_CallFunction Name="K2Node_CallFunction_10"
   FunctionReference=(MemberName="SetCVAR_Bool",MemberGuid=C7561D0D45F0FF5A46D318A7D842B3B6,bSelfContext=True)
   NodePosX=112
   NodePosY=-144
   NodeGuid=2A8E082E4CDE4559BB030B9AE59464BC
   CustomProperties Pin (PinId=0C8210B449630BC50B66CDAE7A6EFD01,PinName="execute",PinToolTip="
Exec",PinType.PinCategory="exec",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(K2Node_CallFunction_9 0250859F470E29F282297493D13473DB,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=0250859F470E29F282297493D13473DB,PinName="then",PinToolTip="
Exec",Direction="EGPD_Output",PinType.PinCategory="exec",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(K2Node_CallFunction_2 0C8210B449630BC50B66CDAE7A6EFD01,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=9A7718634EDA4EE510476F8D3E4FCF8F,PinName="self",PinFriendlyName=NSLOCTEXT("K2Node", "Target", "Target"),PinToolTip="Target
Self Object Reference",PinType.PinCategory="object",PinType.PinSubCategory="self",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=67E9C9B14E0020FA1C3CDA9B830227E6,PinName="CVar",PinToolTip="CVar
String",PinType.PinCategory="string",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="r.RayTracing.Reflections.MaxBounces",PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=D76F51764CA9D739999641A59F23ADFA,PinName="State",PinToolTip="State
Boolean",PinType.PinCategory="bool",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="false",AutogeneratedDefaultValue="false",LinkedTo=(K2Node_VariableGet_14 AE2EDD5F4ECCCB4F773715ACEB926FD0,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
End Object
Begin Object Class=/Script/BlueprintGraph.K2Node_CallFunction Name="K2Node_CallFunction_2"
   FunctionReference=(MemberName="SetCVAR_Bool",MemberGuid=C7561D0D45F0FF5A46D318A7D842B3B6,bSelfContext=True)
   NodePosX=112
   NodePosY=64
   NodeGuid=FDD32B0442D7AD22C89485BD7A28A882
   CustomProperties Pin (PinId=0C8210B449630BC50B66CDAE7A6EFD01,PinName="execute",PinToolTip="
Exec",PinType.PinCategory="exec",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(K2Node_CallFunction_10 0250859F470E29F282297493D13473DB,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=0250859F470E29F282297493D13473DB,PinName="then",PinToolTip="
Exec",Direction="EGPD_Output",PinType.PinCategory="exec",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(K2Node_CallFunction_3 D16B372A4CF7650EFCE5159C2D713647,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=9A7718634EDA4EE510476F8D3E4FCF8F,PinName="self",PinFriendlyName=NSLOCTEXT("K2Node", "Target", "Target"),PinToolTip="Target
Self Object Reference",PinType.PinCategory="object",PinType.PinSubCategory="self",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=67E9C9B14E0020FA1C3CDA9B830227E6,PinName="CVar",PinToolTip="CVar
String",PinType.PinCategory="string",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="r.RayTracing.GlobalIllumination.MaxBounces",PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=D76F51764CA9D739999641A59F23ADFA,PinName="State",PinToolTip="State
Boolean",PinType.PinCategory="bool",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="false",AutogeneratedDefaultValue="false",LinkedTo=(K2Node_VariableGet_4 F3CC949142F839C72C24EEB65535EE4F,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
End Object
Begin Object Class=/Script/BlueprintGraph.K2Node_VariableGet Name="K2Node_VariableGet_14"
   VariableReference=(MemberName="ReflectionMaxBounces",MemberGuid=6FA2070C48003861AE5F1187CCD05557,bSelfContext=True)
   NodePosX=-192
   NodePosY=-32
   NodeGuid=8CFC421F421D807BDEFC418013913FBE
   CustomProperties Pin (PinId=AE2EDD5F4ECCCB4F773715ACEB926FD0,PinName="ReflectionMaxBounces",Direction="EGPD_Output",PinType.PinCategory="bool",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="false",AutogeneratedDefaultValue="false",LinkedTo=(K2Node_CallFunction_10 D76F51764CA9D739999641A59F23ADFA,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=1FBCEF86439E073AC2E3EE81C4C42F21,PinName="self",PinFriendlyName=NSLOCTEXT("K2Node", "Target", "Target"),PinType.PinCategory="object",PinType.PinSubCategory="",PinType.PinSubCategoryObject=BlueprintGeneratedClass'"/Game/Blueprints/Raytracing_Controller.Raytracing_Controller_C"',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=True,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
End Object
Begin Object Class=/Script/BlueprintGraph.K2Node_VariableGet Name="K2Node_VariableGet_4"
   VariableReference=(MemberName="GI_MaxBounces",MemberGuid=F7277BF04DADE0054D17229B6EC87A2E,bSelfContext=True)
   NodePosX=-160
   NodePosY=192
   NodeGuid=764162DC46669DEC777143B6A5145CFE
   CustomProperties Pin (PinId=F3CC949142F839C72C24EEB65535EE4F,PinName="GI_MaxBounces",Direction="EGPD_Output",PinType.PinCategory="bool",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="false",AutogeneratedDefaultValue="false",LinkedTo=(K2Node_CallFunction_2 D76F51764CA9D739999641A59F23ADFA,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   CustomProperties Pin (PinId=E72C3BB14D5460AE12ED8A8B71B793B3,PinName="self",PinFriendlyName=NSLOCTEXT("K2Node", "Target", "Target"),PinType.PinCategory="object",PinType.PinSubCategory="",PinType.PinSubCategoryObject=BlueprintGeneratedClass'"/Game/Blueprints/Raytracing_Controller.Raytracing_Controller_C"',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=True,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
End Object
Begin Object Class=/Script/BlueprintGraph.K2Node_CallFunction Name="K2Node_CallFunction_9"
   FunctionReference=(MemberName="SetCVAR_Bool",MemberGuid=C7561D0D45F0FF5A46D318A7D842B3B6,bSelfContext=True)
   NodePosX=128
   NodePosY=-336
   NodeGuid=18357B3A4C76F9B89C31E985B46828F7
   CustomProperties Pin (PinId=0C8210B449630BC50B66CDAE7A6EFD01,PinName="execute",PinToolTip="
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End Object
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End Object
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End Object
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End Object
Begin Object Class=/Script/BlueprintGraph.K2Node_VariableGet Name="K2Node_VariableGet_1"
   VariableReference=(MemberName="ReflectionDenoise",MemberGuid=18908A664B22ED74B63B8AB105D62B26,bSelfContext=True)
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   NodePosY=1824
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End Object

I hope that helps!

[Chesire]

Cheers for this @DCrosby. I don’t see any translucency cvars being used so am I right in assuming you didn’t toggle that? (r.RayTracing.Translucency 1).

Edit: FIXED> separate translucency must be OFF in project settings

[CarlosBayer]

i cant start the unreal using the “-dx12”, always crash!! anyone can help me? last nvidia drive used, rtx2080ti, windows full updated!

[Chesire]

@CarlosBayer

i cant start the unreal using the “-dx12”, always crash!! anyone can help me? last nvidia drive used, rtx2080ti, windows full updated!

What works for me most of the time is the following:

1. Launch 4.22 from within the Epic Games launcher (meaning NO -dx12 shortcut)
2. Convert your project to 4.22
3. Make sure you disable all lights, static lighting flushed etc.
4. Save
5. Now launch 4.22 with the -dx12 shortcut and load your project.

​​​​​​​

[CarlosBayer]

@Chesire

What works for me most of the time is the following:

1. Launch 4.22 from within the Epic Games launcher (meaning NO -dx12 shortcut)
2. Convert your project to 4.22
3. Make sure you disable all lights, static lighting flushed etc.
4. Save
5. Now launch 4.22 with the -dx12 shortcut and load your project.

but, the error not happen with project, when i try open the UE4editor, have a crash and show this message. i cant try to open anyone project…

[RayRayJnr]

@Tim_Hobson

RT won’t have every feature at launch, like Landscape support, which has been mentioned a number of times here, but it’ll have a lot for everyone to check out. I’m not sure how long it will stay Early Access, but over the next release or two, there will be additional features coming online for sure!

AO doesn’t seem to be showing up in reflections, will that make it into 4.22? and will emissive materials ever work in raytraced GI?
Also, something like lightmass portals for raytraced GI would be good. I’m getting splotchy interiors no matter how many bounces and spp i use.

[Xerithas]

Just had a play and it’s pretty cool, unfortunately I don’t have any assets ready to throw in.
Reducing the GI resolution to like 25% and pumping spp up to 128-256 seems to eliminate noise, might not need that many samples in some kind of stylized fantasy like game (I was mainly just using clean materials).

I’m super interested to see if they have some smart way to handle rebuilding the BVH/BLAS for terrain… Sounds like a headache.

[Nigkdo]

Hello. I did more testing. Raytraced shadows from directional light are great!

UE4 Raytracing test 2 ( shadows in the DISTANCE )