Unreal Engine 4.23 Preview

[Lesuge]

This is already noted in the Ray Tracing page's limitations. Translucent shadow support is not yet implemented (for 4.22 or 4.23), so the shadow will show as opaque. Ray Tracing with translucency is a very difficult problem to solve and it's on the list of things to tackle, just not this release.

In which state is the RT Translucency in the 4.23 release? Because if transparency affects neither reflection nor shadow, then the application area for transparency is quiet minimal.

[Amanda.Schade]

UPDATE!

We have just released Preview 4 for 4.23! Thank you for your continued help in testing the 4.23 build before its official release. As a reminder, the Preview builds are for testing only, and should not be used for the active development of your project.

For a list of known issues affecting this latest preview, please follow the links provided on the original post in this thread.

Fixed in Preview 4
Fixed! UE-77592 Crash compiling AnimBP when AnimDynamics Chain End is set to the root bone and Bound Bone is set to a child bone
Fixed! UE-77747 ParallelEvaluationAnimation deprecation typo 4.32
Fixed! UE-74302 Copying skin weights from an invalid skel mesh doesn't give you a warning or error it just quietly fails
Fixed! UE-77811 Modify Transforms' Override Global Mode has an incorrect tooltip
Fixed! UE-73057 SynthKnob's overlays aren't properly pinned to the widget's position
Fixed! UE-77173 Incorrect data type in FDumpFPSChartToEndpoint::DumpChart()
Fixed! UE-77489 "Stat Hitches" command is not recognized
Fixed! UE-77600 [CrashReport] UE4Editor-Slate!FSlateApplication::Get() [SlateApplication.h:304]
Fixed! UE-78014 [CrashReport] UE4Editor-Core!OnCVarChange<int>(int &,int const &,EConsoleVariableFlags,EConsoleVariableFlags) [ConsoleManager.cpp:287]
Fixed! UE-77851 Automation Test Failed PropertyIterator - Project.Engine.PropertyIterator
Fixed! UE-77392 Crash after autosaving when trying to hot reload in QAGame
Fixed! UE-77444 Dataprep progress bars don't show progress
Fixed! UE-77830 Crash importing a file through Datasmith in Python headless mode - DatasmithImporterImpl::CheckAssetPersistenceValidity() [...\enterprise\plugins\editor\datasmithimporter\source\datasmithimporter\private\datasmithimporter.cpp:209]
Fixed! UE-77697 Large Datasmith file crashes at the end of the import process
Fixed! UE-77605 [CrashReport] UE4Editor-CoreUObject!UObjectBaseUtility::GetOutermost() [UObjectBaseUtility.cpp:121]
Fixed! UE-77980 Disable Dataprep editor from non-studio projects
Fixed! UE-77989 Missing Retessellate action from actor context menu
Fixed! UE-77993 Crash reimporting cityEngine Redlands scene (...datasmithimporter\source\datasmithimporter\private\datasmithimportfactory.cpp:698)
Fixed! UE-77359 OpenNurbs.tps file is empty.
Fixed! UE-77078 Wrong triangle orientation after CATIA CAD import
Fixed! UE-76477 Retessellation materials issue
Fixed! UE-77763 Crash on CATIA file import
Fixed! UE-75748 Triangles disappear when doing fine tessellation
Fixed! UE-76015 Datasmith CAD: Tessellation settings not accessible from Static Mesh Editor
Fixed! UE-77805 Materials and mesh association are broken when importing a RHINO file
Fixed! UE-77793 Editor crash when importing a RHINO file
Fixed! UE-78051 Missing triangles on Datasmith Import
Fixed! UE-74242 Cinema 4D - Reimport datasmith scene doesn't update the UVs
Fixed! UE-77430 Cinema 4d - PBR reflectance conformity is not maintained
Fixed! UE-72712 Cinema 4D - Object resize is not updated through DatasmithScene reimport
Fixed! UE-77560 Cinema 4D - Unsupported dependent euler angles rotation order
Fixed! UE-77439 Cinema4D - Fracture tool should import only visible meshs
Fixed! UE-77432 Cinema4D - Particles are visible before birth
Fixed! UE-74256 Cinema 4D - Material assignment not properly updated upon reimport
Fixed! UE-77806 Cinema4D - Materials are washed out
Fixed! UE-37807 UGS sync fails on mac with p4: Can't clobber writable file
Fixed! UE-77597 RestrictedToClasses UCLASS Meta expects space delimiters but documentation shows comma delimiters
Fixed! UE-77239 [CrashReport] UE4Editor-Engine!FLevelCollection::RemoveLevel(ULevel * const) [World.cpp:256]
Fixed! UE-77727 The MultiGate Node can have more than 32 output pins
Fixed! UE-77854 Spectator is not properly unpossessed
Fixed! UE-74143 Attempting to force delete a blueprint asset referenced by another blueprint can fail and result in the parent class to go "missing" (then crash)
Fixed! UE-77166 Find in Blueprints generates logspam after changing a variable's type: Invalid boolean encountered while reading archive FMemoryReader
Fixed! UE-77646 GitHub 6057 : Clip the value type selector of maps
Fixed! UE-74598 Crash compiling an actor blueprint after reloading an in-use Scene Component blueprint that was reparented to Actor Component
Fixed! UE-77817 Ensure copying a UCS component in the Components tab (with Hide Construction Script Components disabled)
Fixed! UE-77818 Crash trying to make a child blueprint from a blueprint instance after pasting one of its own components into it
Fixed! UE-77845 Fix Fast Array GUID Tracking in replays
Fixed! UE-77899 DemoScrub command Doesn't Pause Replay
Fixed! UE-77224 [CrashReport] UE4Editor-Engine!FPhysScene_PhysX::UpdateKinematicsOnDeferredSkelMeshes() [PhysScene_PhysX.cpp:1012]
Fixed! UE-77764 Physical Animation Automated Tests fail during CheckRBN
Fixed! UE-77047 Chaos related plugins are enabled by default even though Chaos isn't compiled for the engine by default
Fixed! UE-76714 Simulations/Fields sometimes don’t work/fire.
Fixed! UE-76746 LevelSet Generation is too aggressive.
Fixed! UE-77167 Auto Save takes a long time when the user has a bone in a Geometry Collection Actor selected
Fixed! UE-77827 Chaos defaults to a non-working tick model in release previews
Fixed! UE-77160 Selecting bones in a Geometry Collection Actor prompts user to check out the level
Fixed! UE-76567 Undoing the selection of a bone in the ChaosDestructionDemo takes a long time
Fixed! UE-77390 Geometry Collection actor Debug Draw options are only displayed when playing or simulating
Fixed! UE-77180 Select Rigid Body section accidentally collapses when reaching the end of the navigation
Fixed! UE-77145 NewSimplicial InitialSize process takes a very long time
Fixed! UE-75921 Unhandled exception crash when multi selecting a bone in a re-fractured geometry collection
Fixed! UE-76699 Array out of bounds crash switching to the Fracture Editor after reloading a Geometry Collection
Fixed! UE-77511 Launching UE4Editor on Linux fails - SteamVR.so cannot be loaded by the OS
Fixed! UE-76592 GitHub 5960 : Removing conditions on include paths for QtCreator
Fixed! UE-69256 Add FPlatformMisc::GetPlatformChunkInstall() to Linux
Fixed! UE-77948 Linux OpenVR 1_5_17 lib is not binary compatible with our baseline
Fixed! UE-74803 Unreal Project Browser crash when switching the uproject filter on Linux
Fixed! UE-76563 UBT does not delete *.debug and *.sym files on -clean
Fixed! UE-77665 Dedicated server crashes on Mac, Assertion Failed: Device [File:/AppleMovieStreamer.cpp] [Line: 148]
Fixed! UE-77043 Xcode 11 compile warnings: Declaration shadows a variable in the global namespace
Fixed! UE-73347 Fix SceneDepth material node usage in post-process materials
Fixed! UE-73378 Crash on Android when launching WEX - E/libsigchain(15768): Warning: Unexpected sigaction action found
Fixed! UE-71669 ActionRPG foliage does not react to static lighting in -game mode with Force Surface lightmaps set
Fixed! UE-77013 Vulkan Android apps render completely black on Pixel / Android 7.1.2
Fixed! UE-76365 Resolve inconsistencies in VulkanPipeline.cpp
Fixed! UE-77021 Disabling Gradle causes failure when launching onto Android device.
Fixed! UE-57319 Media textures are over saturated on ES31
Fixed! UE-65643 OpenGLES API deprecated warnings when packaging for iOS12
Fixed! UE-77848 Crash on start on KitKat
Fixed! UE-76944 Crash Running Vulkan Mobile Preview
Fixed! UE-77647 Android compiles for x64 (Intel x86_64) fail due to Oculus plugin
Fixed! UE-75876 Assertion failed closing app on Android referencing DynamicRHI.h:176
Fixed! UE-77461 Unaccounted Stat in Stat GPU Higher than Expected
Fixed! UE-71643 [CrashReporter] UE4Editor-Engine!FMaterialRenderProxy::EvaluateUniformExpressions(FUniformExpressionCache &,FMaterialRenderContext const &,FRHICommandList *) [MaterialShared.cpp:2039]
Fixed! UE-77448 Windows Cooked Game Crash
Fixed! UE-73415 [CrashReport] - UE4Editor-D3D11RHI!VerifyD3D11CreateTextureResult - FRDGBuilder
Fixed! UE-73090 [CrashReport] UE4Editor-Renderer!FMaterialShader::VerifyExpressionAndShaderMaps(FMaterialRenderProxy const *,FMaterial const &,FUniformExpressionCache const *) [ShaderBaseClasses.cpp:165]
Fixed! UE-75505 Failed to launch project with -D3D10 Command Line Argument
Fixed! UE-77828 Landscape Mountains out of memory Crash in -Vulkan on a GTX 770
Fixed! UE-77717 Unresolved external symbol error for RecacheMaterialInstanceUniformExpressions
Fixed! UE-77405 Ensure when visualizing screen space subsurface scattering
Fixed! UE-77364 Skeletal mesh receiving incorrect lighting from spotlight with transmission enabled
Fixed! UE-76636 Normal Decal appears very dark
Fixed! UE-75843 Launch-on for OpenGL4 isn't cooking content for Targeted RHI
Fixed! UE-77480 Volume Texture Preview not Rendering Source Texture when Tile Size is Set
Fixed! UE-77786 Engine Test - 'ST_DFVertexDisplacement' test failed - Displacement contact points on Spheres appear more collapsed
Fixed! UE-77785 Engine Test - 'LODCurveLinkingTest1' test failed - Resulting Shadow is inconsistent
Fixed! UE-77247 Niagara Mesh Particles do not face camera when using Camera Position facing mode
Fixed! UE-77836 Crash referencing system level module dependencies at the emitter level
Fixed! UE-77933 Add a per material flag for casting ray tracing shadows
Fixed! UE-77362 Crash on Mac when opening TM-Transmission - Assertion failed: [File: /PipelineStateCache.cpp] [Line: 139] Shader compilation failures are Fatal.
Fixed! UE-76628 Handled Ensure occurs Entering Circle DoF with Vulkan
Fixed! UE-76455 Fix bad size on D3D11 RHI
Fixed! UE-74840 Crash when landscape layers is enabled in World Settings on Mac
Fixed! UE-77707 Show warnings when using a deprecated RHI
Fixed! UE-76908 Recorded Skeletal Props with Subsequences have wrong times
Fixed! UE-77473 Crash/ensure when deleting a spawnable Light from Sequencer
Fixed! UE-77754 Remove viewport shortcuts that conflict (ie. up, down, left, right)
Fixed! UE-77574 Skeletal Meshes in a hierarchy are recorded incorrectly
Fixed! UE-77632 Splitting Animation Section in Sequencer puts skeleton into bind pose
Fixed! UE-74932 Lose focus of sequencer after using shortcut CTRL+G
Fixed! UE-77726 Crash when reloading Sanctuary.umap in ShooterGame
Fixed! UE-74023 Vertex Paint Erase Alpha to default on 0 instead of 1
Fixed! UE-77606 [CrashReport] UE4Editor-Engine!AActor::SetActorLocation(FVector const &,bool,FHitResult *,ETeleportType) [Actor.cpp:3462]
Fixed! UE-74151 [CrashReport] UE4Editor-MessageLog!FMessageLogListingModel::AddMessageInternal(TSharedRef<FTokenizedMessage,0> const &,bool) [MessageLogListingModel.cpp:63]
Fixed! UE-77932 Crash when switching Viewport Types with Unloaded Blueprint
Fixed! UE-77696 Foliage Mode's Single Instance Mode and Place in Current Level are not stored between Editor session
Fixed! UE-77686 Crash importing into Level a USD file with Import Properties option enabled
Fixed! UE-77791 Crash reimporting a USD file with custom property and Existing Actor Policy set to Ignore - UE4Editor_CoreUObject!UObject::PostEditChange() [...\engine\source\runtime\coreuobject\private\uobject\obj.cpp:336]
Fixed! UE-77911 Intermittent Crash when importing a USD file with LOD variants - IUsdPrim::GetNumLODs() [...\engine\plugins\importers\usdimporter\source\unrealusdwrapper\private\unrealusdwrapper.cpp:478]
Fixed! UE-77699 Landscape Mode's Terrace settings are not kept between Editor session
Fixed! UE-78023 UV overlay in Static Mesh Editor displays UDIMs incorrectly
Fixed! UE-77692 The transaction details panel does not detect BP array variable changes
Fixed! UE-76612 Multiple dependency warnings for Concert Client Presence Actor referencing VR and Desktop during Launch on to TM-ShaderModels
Fixed! UE-77718 Crash rejoining MultiUser session while syncronizing packages
Fixed! UE-77846 Pressing CTRL + A and hitting backspace/delete in an Editable Text box does not delete all text
Fixed! UE-77522 Collaborative Viewer - Oculus - the command menu is upside down on left hand.
Fixed! UE-77635 Unreal Studio Collaborative Viewer Blueprint Runtime Error: "Accessed None trying to read property ContextualWidget". Blueprint: BP_Desktop_FlyMode_Pawn Function: Execute Ubergraph BP Desktop Fly Mode during PIE
Fixed! UE-74291 Synth Knob widget rotates around the center of the screen
Fixed! UE-75834 Virtual Camera Record button on the ipad becomes inactive after a retake
Fixed! UE-77637 Crash when Deleting a selected object from the Virtual Production VR panel - UE4Editor_CoreUObject!UObjectBase::IsValidLowLevel() [\engine\source\runtime\coreuobject\private\uobject\uobjectbase.cpp:311]
Fixed! UE-77652 Hangs when quitting UE with live connection to Mobu with LiveLink
Fixed! UE-77050 Vive Controllers are visible while utilizing Oculus hardware and the Virtual Scouting interactor class instead of Oculus controllers
Fixed! UE-77438 RelativeToGameDir FilePath becomes absolute when clicking outside the field
Fixed! UE-77066 VirtualScoutingInteractorMW is a selectable Interactor Class option in Editor Preferences
Fixed! UE-76912 [LiveLink] Update Maya LiveLink plugin to select the role type
Fixed! UE-77525 late feature nDisplay warp & blend support
Fixed! UE-77760 VirtualScoutingInteractor - Vive Controller overlaps the Oculus Controller when using Markers
Fixed! UE-76642 Handheld AR debug menu buttons are all black
Fixed! UE-57680 [CrashReport] UE4Editor_SteamVR!FSteamVRModel::GetRawMeshData() [steamvrassetmanager.cpp:307]
Fixed! UE-73217 Support latest version of OpenVR for SteamVR
Fixed! UE-76173 Remove hololens message when generating projects
Fixed! UE-74991 Vive - Motion Controller Component - Temporal AA Regression
Fixed! UE-77258 SteamVR controller jittery and laggy with low-latency update enabled.
Fixed! UE-77612 Packaging a blank blueprint project for Android (Multi) x86_64 fails with compile errors in OculusHMDPrivate.cpp error: unknown type name 'FPose'

REMEMBER: Please report any new bugs you find by following the How To Report a Bug Guide

[Odenir]

Is Project Settings > Engine - Rendering > "mask material only in early z-pass" working/fixed?

I read something about it, and people say it give a huge performance boost, however there was developers saying it was working on 4.21, but it's not work on Unreal 4.22 and it would work again on 4.23.

I tried "mask material only in early z-pass" on my 4.22 project and I think it's not working because my performance/fps was the same.

[RVillani]

I tried "mask material only in early z-pass" on my 4.22 project and I think it's not working because my performance/fps was the same.

It won't make that much of a difference in performance if you're not using a lot of masked stuff, with a bunch of overdraw, like trees and grass. You can see if it's working by looking at a masked actor in material complexity view mode (Alt+8). When "Mask material only in early z-pass" is enabled, you should only see the masked part of the material. If it's not working, you'll see the masked material the same as you would a transparent one: the transparent parts cause overdraw and are colored more towards red in material complexity view mode.

[theProfessor]

Is Chaos usable now?

[Daffrendo]

I've searched our CrashReporter system, and don't see any reports from you. Are you submitting when the CrashReporter dialog appears after the crash? This helps us identify the most commonly occurring crashes to prioritize fixes for.

Or on top of that, have you logged a bug report yet? https://epicsupport.force.com/unrealengine/s/

Okay! Regarding PointLight crashes - I found a strange workaround to allow for Point Lights without crashing.
Have not tested in Preview 4, but this was the finding in Preview 3.

I needed to enable RayTracing first, then add point lights, and that served a s the 'Key' to add point lights without issue.
Because then I could enable and disable Raytracing and add as many point lights as I wanted and UE4 would not crash, no matter what I did.

Now, I was always running the -dx12 version of Preview 3, perhaps that was an issue here.
Like, maybe if I had run non-dx12 it would have accepted point lights fine from the outset (in Raster/non-Raytrace)

Stephen, also attached is 1 screenshot of my 4 crash report logs I created and submitted today while testing...

THX!

[MrAlexNice]

Where are these new "Virtual Scouting" tools located?

[Alexander P_]

Thank you Epic for all your hard work pushing this updates. . . . If can i ask is there any news about AR Core for the final 4.23 launcher version.

Thank you!

[UnexpectedSquirt]

Hey Unreal people!

Just wanted to say thanks to the devs for the continued improvements to the engine!

I also would like to point out that as of 4.23 (preview 4) things on Android (ES3.1) are a little crazy.

1. "mobile multi-view" causes the screen to go black when the game is cooked. Previously this only happened when this feature was enabled alongside "Mobile HDR", but as of 4.23 it happens regardless of the HDR setting.

2. All of the faces on my meshes are now inverted when viewed on my android device. (turned inside out). This bug seems to have been caused by the fix implemented for UE-74656.

[NilsonLima]

1. "mobile multi-view" causes the screen to go black when the game is cooked. Previously this only happened when this feature was enabled alongside "Mobile HDR", but as of 4.23 it happens regardless of the HDR setting.

2. All of the faces on my meshes are now inverted when viewed on my android device. (turned inside out). This bug seems to have been caused by the fix implemented for UE-74656.

It would be great if you could do a simple project per issue with repro steps using the link for reporting to the engine team, since it is a behavior and not a crash: using this link

[UnexpectedSquirt]

It would be great if you could do a simple project per issue with repro steps using the link for reporting to the engine team, since it is a behavior and not a crash: using this link

I submitted a report for the second issue, but I'm reluctant to put anything in for the first, as mobile multi view already seemed to be semi-broken in < 4.22 I am just assuming that it's an experimental or unsupported feature on mobile VR devices?

[NilsonLima]

I submitted a report for the second issue, but I'm reluctant to put anything in for the first, as mobile multi view already seemed to be semi-broken in < 4.22 I am just assuming that it's an experimental or unsupported feature on mobile VR devices?

If it is experimental it is ok to submit a report, but if it was already mentioned as unsupported then maybe not, but I would submit anyway even if to receive a definitive response about its being supported or not.

[mordentral]

Cannot express enough how much better the steamVR game thread controller positions are now with the new pose retrieval in 4.23 p4. Its like night and day, around half as much latency as before.....

[tc22]

423 realtime GI fail and error in gi bounces

https://youtu.be/5K-xy1sb5J8

[aussieburger]

I submitted a report for the second issue, but I'm reluctant to put anything in for the first, as mobile multi view already seemed to be semi-broken in < 4.22 I am just assuming that it's an experimental or unsupported feature on mobile VR devices?

The first issue has been already reported: https://issues.unrealengine.com/issue/UE-77549

Glad you found that second issue cause I stumbled on that as well and couldn't work it out! Could you post the issue here so we can upvote it?

I also reported these two issues which are related to mobileVR as well:

https://issues.unrealengine.com/issue/UE-76654
https://issues.unrealengine.com/issue/UE-70092

both block you from doing a release for those platforms