Unreal Engine 4.26 Preview

[RoyAwesome]

Are physics asset setups built in previous versions of Unreal Engine expected to just work with Chaos now that PhysX is deprecated?

All of my vehicle setups are broken in 4.26. I even pulled down some assets from the marketplace that were broken, and the vehicle sample project is broken. I cannot seem to get vehicles to function.

[MostHost LA]

Are physics asset setups built in previous versions of Unreal Engine expected to just work with Chaos now that PhysX is deprecated?

All of my vehicle setups are broken in 4.26. I even pulled down some assets from the marketplace that were broken, and the vehicle sample project is broken. I cannot seem to get vehicles to function.

its the editor thats not ready yet. This release doesn't have physx parity.

[S-ed]

Small icons are missing from UI.

[EverFire]

how to switch mobile preview. click （ Setting -> Preview Rendering Level -> Android ES 3.1 ） there is no any response. Someone has the same problem as me

[Scarfield.]

Enabling HZBO causes the 4.26 Preview 2 to crash:

Fatal error: [File:/Build/++UE4/Sync/Engine/Source/Runtime/RenderCore/Private/RenderingThread.cpp] [Line: 907]
Rendering thread exception:
Assertion failed: !bIsLoadActionInvalid [File:/Build/++UE4/Sync/Engine/Source/Runtime/RenderCore/Private/RenderGraphValidation.cpp] [Line: 421]
Pass 'TestHZB' attempted to bind texture 'HZBResultsGPU' as a render target with the 'Load' action specified, but the texture has not been produced yet. The render target must use either 'Clear' or 'NoAction' action instead.

UE4Editor_Core
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UE4Editor_Core
UE4Editor_Core
UE4Editor_RenderCore
UE4Editor_RenderCore
UE4Editor_Core
UE4Editor_Core
kernel32
ntdll

0x00007ffd009a3e49 KERNELBASE.dll!UnknownFunction []
0x00007ffcbfd5e9c6 UE4Editor-Core.dll!UnknownFunction []
0x00007ffcbfd620e8 UE4Editor-Core.dll!UnknownFunction []
0x00007ffcbfa734ad UE4Editor-Core.dll!UnknownFunction []
0x00007ffcbfa0b475 UE4Editor-Core.dll!UnknownFunction []
0x00007ffcbfa0d520 UE4Editor-Core.dll!UnknownFunction []
0x00007ffccf06e1df UE4Editor-RenderCore.dll!UnknownFunction []
0x00007ffccefa5a67 UE4Editor-RenderCore.dll!UnknownFunction []
0x00007ffccef9122c UE4Editor-RenderCore.dll!UnknownFunction []
0x00007ffca7e0427d UE4Editor-Renderer.dll!UnknownFunction []
0x00007ffca7e4e42d UE4Editor-Renderer.dll!UnknownFunction []
0x00007ffca7878ac5 UE4Editor-Renderer.dll!UnknownFunction []
0x00007ffca7e42b02 UE4Editor-Renderer.dll!UnknownFunction []
0x00007ffca786fedb UE4Editor-Renderer.dll!UnknownFunction []
0x00007ffca7e43dc2 UE4Editor-Renderer.dll!UnknownFunction []
0x00007ffca7e190ff UE4Editor-Renderer.dll!UnknownFunction []
0x00007ffca7e2d82d UE4Editor-Renderer.dll!UnknownFunction []
0x00007ffca7e313bd UE4Editor-Renderer.dll!UnknownFunction []
0x00007ffcbf825ceb UE4Editor-Core.dll!UnknownFunction []
0x00007ffcbf8260de UE4Editor-Core.dll!UnknownFunction []
0x00007ffccef7fcf2 UE4Editor-RenderCore.dll!UnknownFunction []
0x00007ffccef88314 UE4Editor-RenderCore.dll!UnknownFunction []
0x00007ffcbfd7a1eb UE4Editor-Core.dll!UnknownFunction []
0x00007ffcbfd72e80 UE4Editor-Core.dll!UnknownFunction []
0x00007ffd01b96fd4 KERNEL32.DLL!UnknownFunction []
0x00007ffd02dbcec1 ntdll.dll!UnknownFunction []

[Menesis]

In OP it says

• Volumetric Clouds. The new Volumetric Clouds Actor provides a material-driven real-time cloud rendering system. The component requires a material to work. You can use the default one found in Engine/EngineSky/VolumetricClouds/M_SimpleVolumetricCloud.

But there is no folder called EngineSky in my Unreal 4.26 installation folder?
stupid me. It's in the standard engine content that you can enable inside each project.

[Dazzer1234567]

nDisplay still crashes UE4.26p if you have both SteamVR & nDisplay plugins enabled...... PLEASE fix this!!!

[Loux xavier]

In Preview 2 when I try to play in VR Engine crash.

Assertion failed: !bIsLoadActionInvalid [File:D:/Build/++UE4/Sync/Engine/Source/Runtime/RenderCore/Private/RenderGraphValidation.cpp] [Line: 421] Pass 'Tonemap %dx%d (PS GammaOnly=%d)' attempted to bind texture 'Tonemap' as a render target with the 'Load' action specified, but the texture has not been produced yet. The render target must use either 'Clear' or 'NoAction' action instead.

UE4Editor_Core
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UE4Editor_Renderer
UE4Editor_Renderer
UE4Editor_Core
UE4Editor_Core
UE4Editor_RenderCore
UE4Editor_RenderCore
UE4Editor_Core
UE4Editor_Core
kernel32
ntdll

[Moth Doctor]

Are physics asset setups built in previous versions of Unreal Engine expected to just work with Chaos now that PhysX is deprecated?

All of my vehicle setups are broken in 4.26. I even pulled down some assets from the marketplace that were broken, and the vehicle sample project is broken. I cannot seem to get vehicles to function.

If you're using PhysX Vehicles, that plugin becomes deprecated.
https://github.com/EpicGames/UnrealE...22d3038ee8c5ca

I guess, you will need rework your vehicles into Chaos Vehicles. I expect this is special area that might implemented very differently from the old PhysX version.
https://github.com/EpicGames/UnrealE...VehiclesPlugin

[Loux xavier]

Oh and in Preview 2 with GPU Building, Emissive on Static Mesh produce light but "Use Emissive for Static Lighting" is unchecked

[Shann39]

Can we please have build in 3D navigation system for Flying ?
I'm working on a space game that have aerial combat but the engine only have ground Nav mesh. The only plugin alternative we have is abandoned by the developer.

The Engine need this please!

[The_Distiller]

Even after 2.5 years, poor rect light still doesn't have it's own icon.

[alienpriv]

Sooo... where is the launcher for Linux ?! Unreal Engine is amazing, but what's the point of releasing it on Linux, if I can't add any assets to my projects? And all courses and learning materials constatly refer to the Launcher.

[SONB]

Cloth crashes the editor when it collides with the environment if 'Collide with Environment' is enabled.

[limoxxx]

Niagara System crashes when attaching to a skeletal mesh which contains virtual bones.
At file NiagaraDataInterfaceSkeletalMesh.cpp line 298

if (MasterBoneMap.IsValidIndex(BoneIndex))
{
    const int32 MasterIndex = MasterBoneMap[BoneIndex];
    if (MasterIndex != INDEX_NONE && MasterIndex < MasterTransforms.Num())
    {
         CurrTransforms[BoneIndex] = MasterTransforms[MasterIndex];
         CurrBones[BoneIndex] = SkelMesh->RefBasesInvMatrix[BoneIndex] * MasterTransforms[MasterIndex].ToMatrixWithScale();
         bFoundMaster = true;
    }
}