Unreal Engine 4.26 released!

[Antoshkaster]

“OpenGL was deprecated in 4.23 for use in desktop rendering (SM4/SM5). It is now removed as a desktop option in 4.26. Vulkan is the supported RHI on Linux.”

Thank you Epic for removing OpenGL - it was ONLY option which worked well on Linux and it’s a great idea to switch to Vulkan-only rendering which is still full of bugs and crashes.

I’ll stick with 4.25.

[Mwparra]

My build lightmap is taking forever after cloning my project from 4.25 to 4.26. 4.25 takes 7 mins 32 seconds on preview and now in 4.26 its taking over 14 minutes and its only at 6%. Any help with this. My old project in 4.25 did not have a lightmass importance volume so I added one in 4.26.

Thanks,
Mark

Edit:

So I realized that I had to get rid of some things to bring my project to 4.26. Once I added those things and copied settings I got 6m 15 secs in 4.25 and 10m 43 secs in 4.26.

Thanks,
Mark

[Reasp]

ChaosDestructionDemo 4.26 - not compiling by launcher engine.
BuildingEnvironment = TargetBuildEnvironment.Unique - must be change to Shared

[elettrozero]

There are some house cleanings to do…

[elettrozero]

This part crashes

[moody.by.name]

@Arkiras

Not a volume texture (but you can make volume textures with the Volumetrics plugin)

Red channel is the bottom layer of the clouds, green channel is the big draping plumes.

As you can see, the default texture does not tile:

Just replace it and it will work fine.

Hey thanks! I exported the texture and made it tiling in photoshop, now looks much better…

[polygon]

@AE_3DFX

If you drop volumetric clouds to world then by **default **there is always weird slice corner over head, needs a heavy reconfigure to get rid of it. Nothing serious, but out of box clouds should look fine too.

](filedata/fetch?id=1839451&d=1607169040)

The new cloud system is just mindblowing but I think the default settings are a pretty bad representation of the whole feature. There shouldn’t be those hard edges out of the box and I really hope the documentation will be available very soon. When can we expect a good documentation of this awesome feature?

[R3PTYLA]

https://forums.unrealengine.com/core/image/gif;base64
​hi ​everyone…does anyone know why when i add the volumetric clouds in my scene it makes everything dark?

[CodeSpartan]

@CodeSpartan

Richtext is broken for me in 4.26.

https://i.gyazo.com/835a64d5c3149eb463f2d128fce5e912.png

In case anyone else has this, I’ve narrowed the bug down to Rich Text displaying garbage when inside a Retainer Box. I’ve reported the issue.

[Arkiras]

@polygon

I really hope the documentation will be available very soon.

The future is now.

[Daffrendo]

No idea what any of this means - but whatever it is, it worked in 4.25!

[KevinMO]

@crevetor

From the updated docs here: “If you are using the UE_4.26Chaos build, feel free to skip this section because Chaos is enabled by default.” where can one find this build ?

I agree with this question. When is this build going to be released?

[Daffrendo]

Related directly to my previous post, it appears 4.26 regressed in allowing the amount of Texture Look-ups (ie via Shared Wrap).
Or, it is issuing a maximum texture look-up #, where prior version did not have such maximum limit, as a defensive posture to avoid crashes.

[Magneto]

@Tim_Hobson

If you look at the Volumetric Cloud documentation, it’s outlined there where the content lives in the Volumetrics plugin. Unfortunately, videos for BP clouds and painting are broken (which we’ll get fixed) but you you can find the content by following the information there.

https://docs.unrealengine.com/en-US/…splugincontent

Not sure clouds work properly or perform well yet but** I tried the new water system and it doesn’t work in VR!**

I would like to use it but water flashes in blocks between each eye so it’s not being rendered correctly. Not sure if it’s a bug or epic aren’t supporting VR as much these days and keeping things working well. Even though it’s continuing to grow and will only become more popular as time goes on.

[Amanda.Schade]

@anonymous_user_232197e21

After testing 4.26, I can confirm Tessellation is no longer working. The functions are there but they do nothing.

I am assuming Epic has an alternative in mind? Why remove it, there are many of us who don’t even use Tessellation on landscapes (if they were that bad) we use it on custom geometry and it was working fine.

Tessellation should still be working in 4.26, but will be deprecated in UE5. Would you mind creating a bug report detailing your steps?

[Amanda.Schade]

@KevinMO

I agree with this question. When is this build going to be released?

We don’t have an exact date at this time, but will update this thread once it’s available.

[virtualHC]

I’m experiencing crashes with GPU Lightmass. I’m getting crashes at the de-noising stage about 2 out of 3 times I bake, and UE4 just closes without any error messages. If I turn off de-noising it stops crashing.

I found this in the log. I’m not sure if it’s my own memory limitation (I have 16GB RAM) or a memory management bug in UE4:

[2020.12.07-16.56.28:537][165]LogGPULightmass: Working on: Glass HoleGlassPane slesW_LOD0
[2020.12.07-16.56.58:095][265]LogGPULightmass: Working on: slesW_LOD0 slnv6_LOD0_1 tree
[2020.12.07-16.57.39:537][365]LogGPULightmass: Working on: slesW_LOD0 slnv6_LOD0_1 tree
[2020.12.07-16.58.23:194][465]LogGPULightmass: Working on: tree
[2020.12.07-16.59.22:730][565]LogGPULightmass: Working on: tree
[2020.12.07-17.00.23:147][664]LogGPULightmass: Working on: tree
[2020.12.07-17.01.02:175][765]LogGPULightmass: Working on: tree
[2020.12.07-17.01.23:922][865]LogGPULightmass: Working on: tree
[2020.12.07-17.01.45:777][965]LogGPULightmass: Working on:
[2020.12.07-17.01.46:005][966]LogGPULightmass: Working on:
[2020.12.07-17.01.46:011][966]LogGPULightmass: Working on:
[2020.12.07-17.02.44:107][966]LogMemory: Warning: Freeing 33554432 bytes from backup pool to handle out of memory.
[2020.12.07-17.02.44:118][966]LogMemory: Warning: MemoryStats:
AvailablePhysical 572383232
AvailableVirtual 69783552
UsedPhysical 11002134528
PeakUsedPhysical 12108525568
UsedVirtual 38617370624
PeakUsedVirtual 38695047168
[2020.12.07-17.02.44:118][966]Allocator Stats for TBB: (not implemented)
[2020.12.07-17.02.44:121][966]LogOutputDevice: Warning:

Script Stack (0 frames):

[2020.12.07-17.02.44:123][966]LogWindows: Windows GetLastError: The operation completed successfully. (0)
[2020.12.07-17.02.47:431][966]LogWindows: Warning: SymLoadModuleExW. Error: 8
...
[2020.12.07-17.02.47:435][966]LogWindows: Error: === Critical error: ===
[2020.12.07-17.02.47:435][966]LogWindows: Error:
[2020.12.07-17.02.47:435][966]LogWindows: Error: Fatal error: [File:D:/Build/++UE4/Sync/Engine/Source/Runtime/Core/Private/GenericPlatform/GenericPlatformMemory.cpp] [Line: 197]
[2020.12.07-17.02.47:435][966]LogWindows: Error: Ran out of memory allocating 74520768 bytes with alignment 0
[2020.12.07-17.02.47:435][966]LogWindows: Error:
[2020.12.07-17.02.47:435][966]LogWindows: Error:
[2020.12.07-17.02.47:435][966]LogWindows: Error: [Callstack] 0x00007ffd11e23e49 KERNELBASE.dll!UnknownFunction ]
[2020.12.07-17.02.47:435][966]LogWindows: Error: [Callstack] 0x00007ffc9e5dc386 UE4Editor-Core.dll!UnknownFunction ]
[2020.12.07-17.02.47:435][966]LogWindows: Error: [Callstack] 0x00007ffc9e5dfae8 UE4Editor-Core.dll!UnknownFunction ]
[2020.12.07-17.02.47:435][966]LogWindows: Error: [Callstack] 0x00007ffc9e2edd5d UE4Editor-Core.dll!UnknownFunction ]
[2020.12.07-17.02.47:435][966]LogWindows: Error: [Callstack] 0x00007ffc9e0f0c8a UE4Editor-Core.dll!UnknownFunction ]
[2020.12.07-17.02.47:435][966]LogWindows: Error: [Callstack] 0x00007ffc9e193a56 UE4Editor-Core.dll!UnknownFunction ]
[2020.12.07-17.02.47:435][966]LogWindows: Error: [Callstack] 0x00007ffc9e193b93 UE4Editor-Core.dll!UnknownFunction ]
[2020.12.07-17.02.47:435][966]LogWindows: Error: [Callstack] 0x00007ffc88c74c38 UE4Editor-GPULightmass.dll!UnknownFunction ]
[2020.12.07-17.02.47:435][966]LogWindows: Error: [Callstack] 0x00007ffc88c1c33a UE4Editor-GPULightmass.dll!UnknownFunction ]
[2020.12.07-17.02.47:435][966]LogWindows: Error: [Callstack] 0x00007ffc88c0530c UE4Editor-GPULightmass.dll!UnknownFunction ]
[2020.12.07-17.02.47:435][966]LogWindows: Error: [Callstack] 0x00007ffc88c0f505 UE4Editor-GPULightmass.dll!UnknownFunction ]
[2020.12.07-17.02.47:435][966]LogWindows: Error: [Callstack] 0x00007ffc88c22a2d UE4Editor-GPULightmass.dll!UnknownFunction ]
[2020.12.07-17.02.47:435][966]LogWindows: Error: [Callstack] 0x00007ff6c43a9b6a UE4Editor.exe!UnknownFunction ]
[2020.12.07-17.02.47:435][966]LogWindows: Error: [Callstack] 0x00007ff6c43c113c UE4Editor.exe!UnknownFunction ]
[2020.12.07-17.02.47:435][966]LogWindows: Error: [Callstack] 0x00007ff6c43c121a UE4Editor.exe!UnknownFunction ]
[2020.12.07-17.02.47:435][966]LogWindows: Error: [Callstack] 0x00007ff6c43d527d UE4Editor.exe!UnknownFunction ]
[2020.12.07-17.02.47:435][966]LogWindows: Error: [Callstack] 0x00007ff6c43d7faa UE4Editor.exe!__scrt_common_main_seh() [d:\agent\_work\5\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288]
[2020.12.07-17.02.47:435][966]LogWindows: Error: [Callstack] 0x00007ffd13927034 KERNEL32.DLL!UnknownFunction ]
[2020.12.07-17.02.47:435][966]LogWindows: Error: [Callstack] 0x00007ffd1455cec1 ntdll.dll!UnknownFunction ]
[2020.12.07-17.02.47:435][966]LogWindows: Error:
[2020.12.07-17.02.47:463][966]LogExit: Executing StaticShutdownAfterError
[2020.12.07-17.02.47:964][966]LogWindows: FPlatformMisc::RequestExit(1)
[2020.12.07-17.02.47:964][966]LogCore: Engine exit requested (reason: Win RequestExit)
[2020.12.07-17.02.47:972][966]Log file closed, 12/07/20 12:02:47

[kurylo3d]

Im experiencing crashes on any of my levels for cpu lightmass on 4.26… it crashes when it gets to 60 % of the build of texture streaming part… Any idea what would cause this? In fact i just realized it crashes if i just build the texture streaming

LoginId:cffb2f924a5d4f009521ddb6ad58f899
EpicAccountId:

Fatal error: [File:D:/Build/++UE4/Sync/Engine/Source/Runtime/RHI/Private/PipelineStateCache.cpp] [Line: 139] Shader compilation failures are Fatal.

UE4Editor_RHI!FCompilePipelineStateTask::DoTask() [D:\Build++UE4\Sync\Engine\Source\Runtime\RHI\Private\PipelineStateCache.cpp:907]
UE4Editor_RHI!TGraphTask<FCompilePipelineStateTask>::ExecuteTask() [D:\Build++UE4\Sync\Engine\Source\Runtime\Core\Public\Async\TaskGraphInterfaces.h:886]
UE4Editor_Core!FTaskThreadAnyThread::ProcessTasks() [D:\Build++UE4\Sync\Engine\Source\Runtime\Core\Private\Async\TaskGraph.cpp:1065]
UE4Editor_Core!FTaskThreadAnyThread::ProcessTasksUntilQuit() [D:\Build++UE4\Sync\Engine\Source\Runtime\Core\Private\Async\TaskGraph.cpp:888]
UE4Editor_Core!FTaskThreadAnyThread::Run() [D:\Build++UE4\Sync\Engine\Source\Runtime\Core\Private\Async\TaskGraph.cpp:965]
UE4Editor_Core!FRunnableThreadWin::Run() [D:\Build++UE4\Sync\Engine\Source\Runtime\Core\Private\Windows\WindowsRunnableThread.cpp:86]

[Jambax]

The engine doesn’t seem to cleanly compile/load unless you have the MagicLeap dependencies. For the record, the Setup.bat file I’m using has the following command line:

-exclude=Linux -exclude=Mac -exclude=Android -exclude=Dingo -exclude=WinRT -exclude=Switch -exclude=Linux32 -exclude=osx32 -exclude=osx64 -exclude=Lumin -exclude=IOS -exclude=TVOS -exclude=LeapMotion

Would be great to fix this as it can be a real overhead compiling all the optional platforms that aren’t used.

[RiotDen]

Since version 4.23, my engine crashed, updated to version 4.24.3 the crash disappeared. But recently appeared again ((

Who knows in version 4.26 whether the problem with SceneView.cpp was fixed, namely with this:

[2020.12.05-12.33.00:941][651]LogWindows: Error: === Critical error: ===
[2020.12.05-12.33.00:941][651]LogWindows: Error:
[2020.12.05-12.33.00:941][651]LogWindows: Error: Assertion failed: FVector::Distance(InitOptions.ViewRotationMatrix.GetScaleVector(), FVector::OneVector) < (1.e-4f) [File:D:/Build/++UE4/Sync/Engine/Source/Runtime/Engine/Private/SceneView.cpp] [Line: 464]
[2020.12.05-12.33.00:942][651]LogWindows: Error:
[2020.12.05-12.33.00:942][651]LogWindows: Error:
[2020.12.05-12.33.00:942][651]LogWindows: Error:
[2020.12.05-12.33.00:942][651]LogWindows: Error: [Callstack] 0x000007fefd80a06d KERNELBASE.dll!UnknownFunction ]
[2020.12.05-12.33.00:942][651]LogWindows: Error: [Callstack] 0x000007fee02fa7b6 UE4Editor-Core.dll!UnknownFunction ]
[2020.12.05-12.33.00:942][651]LogWindows: Error: [Callstack] 0x000007fee02fdc58 UE4Editor-Core.dll!UnknownFunction ]
[2020.12.05-12.33.00:943][651]LogWindows: Error: [Callstack] 0x000007fee00b2c7d UE4Editor-Core.dll!UnknownFunction ]
[2020.12.05-12.33.00:943][651]LogWindows: Error: [Callstack] 0x000007fee003fd43 UE4Editor-Core.dll!UnknownFunction ]
[2020.12.05-12.33.00:943][651]LogWindows: Error: [Callstack] 0x000007fee00420c0 UE4Editor-Core.dll!UnknownFunction ]
[2020.12.05-12.33.00:944][651]LogWindows: Error: [Callstack] 0x000007feddef41ff UE4Editor-Engine.dll!UnknownFunction ]
[2020.12.05-12.33.00:944][651]LogWindows: Error: [Callstack] 0x000007feddef0e74 UE4Editor-Engine.dll!UnknownFunction ]
[2020.12.05-12.33.00:944][651]LogWindows: Error: [Callstack] 0x000007fed9b402d9 UE4Editor-UnrealEd.dll!UnknownFunction ]
[2020.12.05-12.33.00:944][651]LogWindows: Error: [Callstack] 0x000007fed9ecce97 UE4Editor-UnrealEd.dll!UnknownFunction ]
[2020.12.05-12.33.00:945][651]LogWindows: Error: [Callstack] 0x000007fed9b48c95 UE4Editor-UnrealEd.dll!UnknownFunction ]
[2020.12.05-12.33.00:945][651]LogWindows: Error: [Callstack] 0x000007fede2082d6 UE4Editor-Engine.dll!UnknownFunction ]
[2020.12.05-12.33.00:945][651]LogWindows: Error: [Callstack] 0x000007fed9aadad2 UE4Editor-UnrealEd.dll!UnknownFunction ]
[2020.12.05-12.33.00:946][651]LogWindows: Error: [Callstack] 0x000007fed9aab2cf UE4Editor-UnrealEd.dll!UnknownFunction ]
[2020.12.05-12.33.00:946][651]LogWindows: Error: [Callstack] 0x000007feda30e476 UE4Editor-UnrealEd.dll!UnknownFunction ]
[2020.12.05-12.33.00:946][651]LogWindows: Error: [Callstack] 0x000000013fcf7f62 UE4Editor.exe!UnknownFunction ]
[2020.12.05-12.33.00:947][651]LogWindows: Error: [Callstack] 0x000000013fd0c3ec UE4Editor.exe!UnknownFunction ]
[2020.12.05-12.33.00:947][651]LogWindows: Error: [Callstack] 0x000000013fd0c4ca UE4Editor.exe!UnknownFunction ]
[2020.12.05-12.33.00:947][651]LogWindows: Error: [Callstack] 0x000000013fd1ceae UE4Editor.exe!UnknownFunction ]
[2020.12.05-12.33.00:947][651]LogWindows: Error: [Callstack] 0x000000013fd1fcbe UE4Editor.exe!UnknownFunction ]
[2020.12.05-12.33.00:948][651]LogWindows: Error: [Callstack] 0x00000000779d59cd kernel32.dll!UnknownFunction ]
[2020.12.05-12.33.00:948][651]LogWindows: Error: [Callstack] 0x0000000077b3383d ntdll.dll!UnknownFunction ]
[2020.12.05-12.33.00:948][651]LogWindows: Error:
[2020.12.05-12.33.00:988][651]LogExit: Executing StaticShutdownAfterError
[2020.12.05-12.33.01:001][651]LogWindows: FPlatformMisc::RequestExit(1)
[2020.12.05-12.33.01:001][651]LogCore: Engine exit requested (reason: Win RequestExit)
[2020.12.05-12.33.01:012][651]Log file closed, 12/05/20 17:33:01