Unreal Engine 4.26 Preview

General Announcements
292

UPDATE!

We have just released Preview 3 for 4.26! Thank you for your continued help in testing the 4.26 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.

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

Fixed in Preview 3

Fixed! UE-99260 Crash editing Transition Logic after deleting State and Transition in State Machine
Fixed! UE-97460 ControlRig : cooked/package issue with FullBodyIK node
Fixed! UE-100320 Debug Drawing no longer working in Control Rig
Fixed! UE-99416 Control Rig Picket Widget needs to be removed
Fixed! UE-97865 Passing in wrong cpp type for creating a RigVMSelectNode still creates a RigVMSelectNode
Fixed! UE-100236 Reparenting higher RigBone to lower RigBone causes crash
Fixed! UE-97748 Crash when Item Chain, Item At index, and Items are linked together into a For Each Item
Fixed! UE-100349 Unparent hotkey and right click command does not work on created RigBones under Imported Skeleton
Fixed! UE-99448 Can’t connect input pin with node when connecting to a execute node prior
Fixed! UE-100348 Creating and Deleting RigBones that are parented in Bone Hierarchy causes bone drawing issues
Fixed! UE-100351 Deleting created RigBone causes weird selection highlighting
Fixed! UE-97979 RigControlValue objects cannot be created with a custom value
Fixed! UE-100340 Control Bone Transform no longer an option for RigSpace or RigBone Manipulation
Fixed! UE-99354 Blend(Transform) not working with any Targets
Fixed! UE-100909 Quaternion Axis node only works with X axis
Fixed! UE-99261 IKRig Plugin preventing packaging and cooking for Pretzel project
Fixed! UE-100595 Sequencer: Control Rig: Need to select control twice to select it in Sequencer
Fixed! UE-100702 animation is different when the level sequence is played from a shot track
Fixed! UE-100245 Controls from Bake to Control Rig move to the origin when scrubbing outside of the Sequence’s playback range
Fixed! UE-100583 Remove check for LevelSequence in selection synchronization
Fixed! UE-100911 Sequencer: Skeletal Animation Section Skeleton no longer shows up after loading.
Fixed! UE-100819 using the function set_tick_resolution in python change the length of the animation
Fixed! UE-100963 MoviePipeline: FCPXML files get written even without the setting added
Fixed! UE-100976 Sequence is not evaluating Control Rig after Bake To Control Rig
Fixed! UE-100564 Preroll doesnt seem to work correctly
Fixed! UE-100468 Pushing Add new key button for Brush.Brush Material Color reset all Color values for selected frame to zero(0.0)
Fixed! UE-100117 console variable not process properly in movie render queue
Fixed! UE-100150 Not all exr metadata is written
Fixed! UE-99872 bFatalError in MoviePipelineFinished callback is false when it fails to write out images
Fixed! UE-101068 Property stats are tracked incorrectly
Fixed! UE-100498 Crash when referencing Null Control Bus in Set Control Bus Mix API
Fixed! UE-100513 Modulation Mix Stages Missing Array Manipulators
Fixed! UE-100496 source effect chains don’t work with looping node sound cues
Fixed! UE-100588 Modulation Envelope Follower Not Responding to Input AudioBus Waveform
Fixed! UE-85534 Turning off an audio volume will keep reverb on, it should fall back to world settings.
Fixed! UE-100492 au.debug.soundmodulators cmd Doesn’t Support Generators Properly
Fixed! UE-100880 Displayed Unit value in ControlBusMix stage is wrong when referencing Bus Param Updated
Fixed! UE-99979 Concurrency does not stop lowest priority or quietest audio in a concurrency group
Fixed! UE-99850 Crashing when Google Resonance is used with Soundfield Submix
Fixed! UE-100010 Resolution Rule - Stop Quietest does not stop the quietest sound in AudioQA map
Fixed! UE-92181 AudioQA fails to package | Numerous errors from assets in Developer folders
Fixed! UE-60647 SoundClass SoundNode Assignments Overridden by SoundCue SoundClass
Fixed! UE-100218 Linux - QAGame failing to package | Failed to compile module
Fixed! UE-100411 GitHub 7377 : Fix of an error when calling Add() in TDiscardableKeyValueCache would cause an inifinite recursion
Fixed! UE-92982 UDelegateProperty define missing in DefineUPropertyMacros.h
Fixed! UE-71682 GitHub 5631 : Introduced additional UE_LOG statements in SavePackage.cpp to explici?
Fixed! UE-100761 Cooking content on Linux results in Assertion failed: Name.Len() > 0
Fixed! UE-97018 Trace.start when using Unreal Insights in Editor fails to start with: LogCore: Warning: Unable to trace to file
Fixed! UE-95807 Actor Pallette not flagged as Experimental/Beta
Fixed! UE-100428 Blueprint nativization fails using a map type argument as Expose on Spawn
Fixed! UE-99591 Packaging failed when create packaged project for Inclusive Nativization
Fixed! UE-100960 Match 3 Gems & Bombs do not appear in PIE & Package
Fixed! UE-99606 Crash renaming nested struct member while the pin is split on a node
Fixed! UE-100951 Blueprint debugger: Step over does not switch focus if parent graph is opened in different window
Fixed! UE-100949 Blueprint debugger: external Blueprint function calls can be stepped into only once
Fixed! UE-100787 Promoting an Array Pin to a Variable (ref to self) in the BP editor results in a compatibility error
Fixed! UE-100762 Variable default value is not preserved when moved to parent class
Fixed! UE-100372 Blueprint node tooltips show parameters instead of the function description
Fixed! UE-100829 The orphan Sub Inst Not Default pin is not removed from the node when set not default values
Fixed! UE-100602 Cannot use Assign node with a Wildcard Container parameters
Fixed! UE-100748 “Default Value” contains zeros after compiling the blueprint with non-zeros values
Fixed! UE-96261 Reimporting sprite sheets does not work correctly if the editor has ever been closed and reopened since initial import
Fixed! UE-88628 Sprite fails to edit based on UV Source Texture Region, when attempting to bulk edit via Bulk Edit Property Matrix.
Fixed! UE-100815 Python - Crash using Actor attach_to_actor method
Fixed! UE-97017 Crash on Mac on exit.
Fixed! UE-99418 EngineTest listen server tests are failling
Fixed! UE-100799 Network profiler doesnt load the captures properly


**Fixed!** UE-97125 Nullptr dereference in iOS IOnlineSession::DestroySession

Fixed! UE-100458 Editor crashes in Chaos when using Retopologize tool
Fixed! UE-96255 Physics simulation is not resumed when an actor’s collision is disabled causing it to fall through objects
Fixed! UE-100914 Contact graph generation very slow in Chaos
Fixed! UE-88367 GitHub 6670 : Fix complex collision display not updating accordingly in StaticMeshEditor
Fixed! UE-100432 Skeletal mesh deforms after un-doing removal of clothing data
Fixed! UE-98103 UE5 TM-AnimPhys - Cloth is not working
Fixed! UE-99639 Ensure when setting restitution of physical material
Fixed! UE-100434 Editor crashes if user Plays in Editor level with Geometry Collection and landscape
Fixed! UE-97318 “CPU not permitted for usage is specified by the affinity mask” error on PSVR
Fixed! UE-100910 RHICopyTexture in GnmRHI is broken for PF_FloatRGB
Fixed! UE-92125 Expanding a Context Menu the second time would close the menu on Linux
Fixed! UE-100731 Linux: Packaging QAEnterprise fails with Lumin.Automation.dll: An item with the same key has already been added
Fixed! UE-100878 Linux: Changing Level Visibility Track to hidden does not function in a Animation Level Sequence.
Fixed! UE-99971 Error pops up when launching editor in 4.26 on Mac with error “Could not access directory required for debugging optimized Metal shaders”
Fixed! UE-100517 Mac - Xcode fails to build C++ project with a Shell Script Invocation Error
Fixed! UE-97293 GitHub 7277 : Use built-in sed
Fixed! UE-90571 GitHub 6780 : Track OpenGL resources in ELLTracker::Platform
Fixed! UE-100921 Indirect lighting cache does not work correctly on mobile with a multiple lighting scenarios
Fixed! UE-96710 App crashes when executing ‘Export to Disk’ node on Android
Fixed! UE-100640 Unreliable Player Index control on MFI controllers
Fixed! UE-96462 Windows showing error when Generating SSH Key: “Error: bUseLocalMetalToolchain”
Fixed! UE-100088 IOS 12 should be the default min supported version
Fixed! UE-100435 GitHub 7385 : ue-4.26 fixes
Fixed! UE-99998 Groom assets don’t render Custom Stencil
Fixed! UE-100805 Boundary Bleed Color does not affect the boundaries of intersecting subsurface materials
Fixed! UE-100806 Boundaries of intersecting Meshes with the same subsurface materials do not blend automatically
Fixed! UE-88969 Adding an LOD to cascade with PIE running is insta crash
Fixed! UE-86798 When using the mesh particle space to world space transform on static meshes the local to world transform matrix should be used
Fixed! UE-99799 Remove shipping only #ifdef in FInstancedStaticMeshSceneProxy::GetDynamicMeshElements
Fixed! UE-85229 FFT Bloom does not properly take exposure into account
Fixed! UE-98238 Hide the appended numbers after dynamic inputs to reduce stack visual noise
Fixed! UE-95610 Editor crashes when dragging Cooked Niagara Emitter to the Level Viewport
Fixed! UE-100596 [CrashReporter] UE4Editor-Niagara!FNiagaraDataInterfaceProxyTexture::PreStage(FRHICommandList &,FNiagaraDataInterfaceStageArgs const &) [NiagaraDataInterfaceTexture.cpp:38]
Fixed! UE-96886 Crash duplicating an Emitter with Interpolated Spawning disabled and Requires Persistent IDs enabled
Fixed! UE-89020 Re-Enable Niagara DataInterfaceInstancedPassThrough autotest for Mac
Fixed! UE-100329 Ensure when entering a name for a Scratchpad Dynamic Input script used in the stack
Fixed! UE-97246 Assertion Failure while building package when setting Cook everything in the project content directory (ignore list of maps below) = true
Fixed! UE-56143 Niagara: support custom depth for masked and opaque particles
Fixed! UE-100098 Ray traced shadow sample settings greater than 1 cause shadow artifacts
Fixed! UE-100870 Spotlight raytrace GI broken when outer angle is tweaked
Fixed! UE-94638 FRegisterComponentContext does not correctly allow render state to initialize.
Fixed! UE-73358 Using Forward Shading and MSAA Renders Out Entirely Black
Fixed! UE-96207 [Materials] Change of behaviour of “Pow” node
Fixed! UE-100591 [CrashReport] UE4Editor-D3D12RHI!FD3D12ResourceLocation::ReleaseResource() [D3D12Resources.cpp:644]
Fixed! UE-100766 Can’t PIE if a transaction didn’t get closed
Fixed! UE-85878 Engine is not compatible with C++17 (USD)
Fixed! UE-100358 When reimporting ExtraField_JSON_Reimport…json a “Cannot find Property for column ‘Extra_Properties’ in struct ‘Struct_DataTable_Basic’.” message does not appear
Fixed! UE-100381 DataTable contains incorrect values when importing a CSV file with an Import Key Field value
Fixed! UE-100359 Cannot find Property message appears when importing a CSV file with Ignore Extra Fields set to True
Fixed! UE-100362 Row is missing entry for column message appears when importing a JSON file with Ignore Missing Fields set to True
Fixed! UE-100635 Crash - console command stat none
Fixed! UE-100791 Crash on checking source control history on QA_WidgetDiffTest2
Fixed! UE-92223 Paper2D tile maps cannot be edited via the modes toolbar in viewport, after they are placed in a level and promoted to an instance
Fixed! UE-100382 Incorrect name rows are used when importing a JSON file with an Import Key Field value
Fixed! UE-100364 Incorrect message appears message appears when importing a JSON file with an invalid Import Key Field value
Fixed! UE-100361 Expected column not found in input message appears when importing a CSV file with Ignore Missing Fields set to True
Fixed! UE-97407 Camera speed needs to remember what you set it to
Fixed! UE-100011 Warning message “MapCheck: Repairing painted vertex colors” appears after open TM-MergeActor
Fixed! UE-100507 Mac - Unable to Package MediaFramewrok in Binary 4.26
Fixed! UE-100524 Crash on commandlet shutdown: GEngine is null in ~FGerstnerWaterWaveViewExtension
Fixed! UE-99984 Unable to slide the Number of Players slider
Fixed! UE-100490 Clicking the “X” in a search field closes the window
Fixed! UE-100038 Linked Revit projects are ignored and not synced with DirectLink
Fixed! UE-90434 Structural Steel Connection Pivots are default
Fixed! UE-100373 DataPrep - Extension filter is ignored on import
Fixed! UE-99271 Texture importer - We can’t import a texture bigger than 8k.
Fixed! UE-100027 Adding two identical Direct Link sources makes the engine crash
Fixed! UE-100704 Reimport datasmith scene from Cinema4D file doesn’t update IES Texture
Fixed! UE-99607 Reset Override function not working on material changes
Fixed! UE-100162 Exported .TXT LiDAR asset opens without ‘texture’
Fixed! UE-64274 Defeaturing - Values from option fields are not map to corresponding options leading to incorrect behavior
Fixed! UE-100483 StaticMeshActor’s material doesn’t update material to None after reimport to updated material
Fixed! UE-100437 Missing CustomDepthStencilWriteMask in Foliage setup
Fixed! UE-85037 Compiling the Editor with CPP Standard of C++17 Fails Due to Errors from USDImporter
Fixed! UE-100728 Crash When You Add Get Landscape Material Node
Fixed! UE-81772 QOL: Using “make selected actors level current” should scroll level browser to that level
Fixed! UE-100537 Crash while adding section using Landscape Tool
Fixed! UE-100833 Crash opening QA-Promotion while in PIE
Fixed! UE-100771 Crash when cancelling Gather Text in Localization Dashboard
Fixed! UE-99849 Material selection is not shared between modeling tools
Fixed! UE-100740 Modeling Tool Interactions based on raycasts into scene hit hidden objects
Fixed! UE-100885 Mesh Selection Tool does not select full brush area on scaled meshes
Fixed! UE-97346 Unable to select Paper2D Actors with Translucent Material in Viewport
Fixed! UE-100888 Cannot place primitive with Add Primitive Tool if no object is hit
Fixed! UE-100919 Repeatedly duplicating mesh with Duplicate Tool in Modeling Mode produces increasingly long names
Fixed! UE-99788 PolyCut tool doesn’t correctly handle cutting out a topological hole
Fixed! UE-100736 Modeling Mode asset settings are not restored on editor restart if changed using quick-access bar
Fixed! UE-100738 PolyEdit Action Buttons are visible during interactive operations but have no effect
Fixed! UE-100607 Join/Browse button does not change to Leave button once in a session with compressed toolbar
Fixed! UE-87589 Upgrade to Python 3.7.7
Fixed! UE-101012 Errors when compiling code project - Python3.Build.cs(8,24) : error CS0246: The type or namespace name ‘Python’ could not be found
Fixed! UE-99615 Slate Debugging Tools should use the unique WidgetID
Fixed! UE-100365 Widgets stick out from letterboxed player screen on 4.25
Fixed! UE-94506 Duplicating a Widget Blueprint containing an Event Dispatcher does not update argument references
Fixed! UE-78845 Undoing Spline actor end point selects base actor instead of last appended anchor point
Fixed! UE-99555 Patch default value, Pixel Mapping trouble
Fixed! UE-100525 Can’t expose arrays / arry element to remote control preset
Fixed! UE-100453 GitHub 7392 : Fixed compilation errors using MSBuild from the master
Fixed! UE-97384 Remote Control API - Can’t use request body with batch request
Fixed! UE-97160 Stage monitor doesn’t notify of missing timecode provider
Fixed! UE-97491 Provider status doesn’t show idle time or a notion of free time
Fixed! UE-97490 StageMon hitch detector spams log
Fixed! UE-97474 Stage Monitor - Event List can not be repopulated if cleared in Review Mode
Fixed! UE-78777 Crash when opening a packaged Simple Composure project
Fixed! UE-96358 Crash when using DMX pixel mapper
Fixed! UE-100501 Crash - Playing Pixel Mapping and then Play in Viewport
Fixed! UE-95869 Adding fixtures to fixture group doesn’t assign attributes correctly.
Fixed! UE-97728 Matrix pixel and fixture pixel position should be relative to their containsrs instead of relative to the texture
Fixed! UE-100111 SwitchBoard - No Detection that UE was launched from previous Switchboad instance (Controls shows Start Unreal)
Fixed! UE-99881 DMX Library isnt marked unsaved after “Undo” operation
Fixed! UE-100393 DMX - Warnings when packaging
Fixed! UE-100623 MF - Strobe Fixture Feedback
Fixed! UE-100634 DMX - Resetting values on begin play is causing problems, interpolation?
Fixed! UE-100622 MF - Fixture Beem Clipping
Fixed! UE-100733 DMX fixture volumetric beam does not match projected gobo
Fixed! UE-100723 Loopback logic is missing for monitor & pixel mapping
Fixed! UE-100742 no warning when fixture matrix has no cell attributes set
Fixed! UE-100727 DMX - Get All Fixtures in Library is not sorted the same as patch.
Fixed! UE-100711 MF - Suggestion for Fixture Patching
Fixed! UE-100531 Remote Control API - Web UI Fixes
Fixed! UE-100535 Remote Control API - Web UI Style
Fixed! UE-98188 Web App VP - Sliders
Fixed! UE-99893 Web App VP - Web Socket Transforms
Fixed! UE-98206 Web App VP - Rotation Order
Fixed! UE-100418 Undo doesn’t work in Interact tool
Fixed! UE-100151 In Virtual Camera, when you use ComposureOutputProvider routed to a RemoteSesstionOutputProvider, the iPad taps register in the space of the entire editor window and not the viewport
Fixed! UE-99879 VR Mode radial menu sub options appearing on incorrect menus
Fixed! UE-97792 Editor crashes when pressing F9 while PIE in VR Preview on Hololens 1
Fixed! UE-93801 GitHub 6997 : Fix reversed left/right eyes in emulatestereo and support WorldToMeters
Fixed! UE-93787 GitHub 6984 : Allow hmd tracked query to ignore extra PIE worlds
Fixed! UE-100343 Hololens 1 needs deprecation for 4.26 forward
Fixed! UE-91798 Motion controller button presses fail to register on Launch On
Fixed! UE-100760 Warnings while packaging for Oculus device with Oculus Avatar plugin enabled: Content has been saved with empty engine version
Fixed! UE-96118 ASA Anchors are not loaded properly from the ASA Store
Fixed! UE-98212 D3D12RHI crashes when attempting to alias a Texture2DArray

293

Waterrrrrrrrrrrrrrrrrr

294

It’s there! If you’re looking for inspiration, check out the livestream we did with Ryan Brucks:

295

Yay. And there was much rejoicing.

296

Seems like the Fluidsim bp is broken for me. The node for “Get first actor in class” seems to not exist. Do i have something not enabled?

297

anyone managed to make this water thing to work?

298

I got about half of it to work. Might make sure the “edit layers” is enabled when creating the landscape, I was stuck on that for a moment tbh

299

Kind of… I loaded the sample map, the river and lake didn’t show up (only the ocean) and when I grabbed one of the spline points the editor immediately crashed.

I figured out that if I moved the lake actor up a little bit then the river/lake would appear, but the foam material seems to be messed up

Gerstner wave actor also seems really weird, the blueprint graph isn’t plugged in and all the variables are red

300

The Water System needs to be independent of the terrains, So those of us using Voxel Terrains can still use it.

301

Some CPU/GPU Lightmass comparisons in 4.26p3, using a stationary skylight, and spotlights with reduced indirect lighting intensity:

UE4_GPULM_StationarySkylight.jpg
UE4_GPULM_StationarySkylight.jpg1104×1164 105 KB

UE4_GPULM_IndirectLightingIntensity.jpg
UE4_GPULM_IndirectLightingIntensity.jpg1104×1168 117 KB

I make heavy use of both of these so I’m really hoping these get addressed at some point. Being able to use GPU Lightmass would be a godsend for me.

302

Also I just noticed; Stationary Skylights now support realtime recapture!! So happy to see this!

303

Anyone knows how to make the water system compatible with skylight time of day?

I watched the stream 3 weeks ago I don’t remember if they mention any compatibility

EDIT : works fine, just needed to update skylight

305

I don’t see any reason why time of day wouldn’t work, you just have to make sure you recapture your skylight to keep reflections correct

306

What about Water system. Did anybody try it? Do you know some simple tutorials?

307

Documentation at least?

308

documentation will come with the final 4.26 release as usual

for now there’s the livestream video and the content included in the plugin (there’s a WaterTestMap)

309

can’t launch project that has raytracing enabled while oculus rift s is plugged in… (preview2 haven’t tried preview1) tried studio and game ready drivers (rtx2070).
Anyone with the same issue, is there a workaround maybe?

scr.jpg

310

Since the groom plugins are now considered production ready, can you active them by default? Thanks!

311

I’ve run into some errors, the Generate Spectrum function is missing from GerstnerWaveController_BP, along with the blueprint trying to use nonexistent connections.
Is there any way to fix this, or will the function be added in the next Preview version?

312

When adjusting post processing settings, either in editor or in game, the new volumetric clouds ‘flicker’ in brightness for a second, is there a way to prevent this?

very specifically, this seems to only happen with exposure settings