Unreal Engine 4.26 released!

[SebHillaire (Sebastien Hillaire)]

@DanH71
Thanks for reporting the name bug.
By default, a very minimal set of properties are shown to enable quick tweaking, e.g. color/intensity.
You can use the dropdown at the bottom to switch between different modes.
Docs: Environment Light mixer in Unreal Engine | Unreal Engine 5.1 Documentation

@Mittens
Thanks!
Yes: cloud rendering for multiple views could not be fixed in time for 4.26 unfortunately.
Bottom of layer broken: yes there is a todo to fix that. Current workaround is to extent the start of the cloud layer to the ground (more expensive to render)

@spacegojira
Those heights have been lowered to 0.1=100meters previously. Lower values can result in visual artifact being more easily visible due to look up tables and thresholds (some can already be visible sometimes at 0.1). It would need more digging and priority for this is low now.
This is already very small and the start up area of the default level is relatively large on such a planet already:

[Poet_11 (William K)]

@clintonman

I had the same problem with FBX files exported from trueSpace.

Holy sh*t Truespace still exists? And someone here is actually using it?! Cool.

[MothDoctor]

LOL, this TrueSpace thing isn’t updated for 11 years already. I wouldn’t expect modern software and FBX importers to work with it

TrueSpace was a commercial 3D computer graphics and animation software developed by Caligari Corporation, bought-out by Microsoft. As of May 2009, it was officially discontinued, but with some ‘unofficial support’ up to February 2010

[notMarius]

I got a weird issue with UMG widget since I updated to 4.26 (I was in 4.24 before),
when I have a userWidget child of a another one, if I go the the child widget and modify it, the widget won’t update correctly in the editor, it’s stay the same.
I have to manually delete it and re-add it to see it updated.

anyone encounter this issue ? I can’t find a bug tracker ticket for that.
thanks for the help

[b1016103]

A new optional plugin called Asset Search that indexes different asset types and stores an indexed set of searchable data in a local SQLite database. This plugin complements the Content Browser search by adding the ability to search for tags and phrases that appear on any asset in the project. In addition, it can be extended to support new asset types in your project or plugin.

Is it intentional that the Asset Search plugin excludes asset metadata? I hope not, since it seems kind of counterintuitive for its purpose. I tried adding metadata to various Content Browser assets. While the new tags show on Asset Actions->Show Metadata, the plugin’s queries don’t list any them at all. Tested on 4.26Chaos, adding metadata tags through the Set Metadata Tag blutility function.

[BoBosan]

@sukovf

I’m getting this strange error when running a packaged game.

LowLevelFatalError [File:Unknown] [Line: 1431]
Null SRV (resource 0 bind 0) on UB Layout None

Any idea what that might be?

UE 4.26 built from source, Release branch. Happens only with DX11, is fine with DX12. I have a Hierarchical Instanced Static Mesh Component in the level. When removed, everything works fine.

I’m currently evaluating UE4 4.26 before migrating our project.
Currently, Cannot reproduce this on completely new project. There seem to be more about this crash.
Could you provide more detail?

[sukovf]

@BoBosan

I’m currently evaluating UE4 4.26 before migrating our project.
Currently, Cannot reproduce this on completely new project. There seem to be more about this crash.
Could you provide more detail?

Sure:

1. Create a new project (BP or C++ based, it doesn’t matter) with ray tracing enabled
2. Create an AActor-based actor, add an HISM component to it and add a single instance in the Begin Play event
3. Place an instance of that actor into an empty level
4. Package the project with the Shipping configuration
5. Run it in the DX11 mode and there you go - crash

This happens in the engine built from the source. Maybe the launcher version is OK, didn’t test that.

[alex-unrealUGSK]

@Oleg_Mazunin

Hi!
I already used take recorder blueprint functions in 4.25 for my virtual production plugin in player controller blueprint and other blueprints. And now I should create node in Editor utility blueprint and copy/past it to player controller? :eek:

Because of the exposed BP Take Recorded API, in 4.25 it was effortless to record at runtime [in VR], and now in 4.26, it’s not possible Why this decision, please?

[alex-unrealUGSK]

@Oleg_Mazunin

Hi!
I already used take recorder blueprint functions in 4.25 for my virtual production plugin in player controller blueprint and other blueprints. And now I should create node in Editor utility blueprint and copy/past it to player controller? :eek:

I’ve tried to copy the nodes from 4.25 into 4.26 and it works just fine.(Level BP) I think they will bring the nodes back, because I don’t see a reason why they should be editor widget bp only nodes.

[LNaej]

Indeed, it was very useful to have these take recording blueprint functions accessible at runtime, would be too bad to don’t have access to them anymore.

[Juanma.elx]

@zaloopa69

Generate UVs in static mesh editor is unrecognized tab (usefull feature by the Polygon Editing plugin). Output:
LogTabManager: Warning: Cannot spawn tab because no spawner is registered for ‘UVGenerationTool’
LogSlate: The tab “UVGenerationTool” attempted to spawn but failed for some reason. An “unrecognized tab” will be returned instead.
LogSlate: Window ‘UVGenerationTool’ being destroyed

I’m experiencing the same issue on 4.26. Here you have a link to the post: https://udn.unrealengine.com/s/question/0D52L000056mG7NSAU/4260-and-uvgenerationtool

[Otreum]

I seem to be running into quite a few issues with animation/sequence bugs.

IN SUMMARY
I upgraded from 4.23.1 source to 4.26 source.
I’ve never had these problems before.
Is there a new hidden setting somewhere that stops animations and sequences from resetting to their start points once they end?
My LevelSequences are set to “KeepState” on finished, and haven’t failed me until now.
My UMG’s have a simple boolean toggle to say if they should play forward or reverse. Forward animations go from 0f to 1f, but reverse animations go from 1f to 0f then back to 1f again when finished where as previously they went from 1f to 0f without any issues.

TL;DR
The problem is happening with SOME level sequences (with cameras movement) and all UMG animation sequences, where once the animation has finished, it snaps back to from 0. I thought maybe that particular level sequence was broken/corrupt, so I created another one, did a different action, without rotation, this time just moving the camera downward, and this time, it would move maybe half way down, then snap back up to the start position.

For example with my UMG pause menu, I have it animated so it scales itself from 0 to 1 in 0.5 seconds. It works fine when playing the animation forward, but upon reversing the animation (1 back to 0 scale), once the animation finishes, it snaps back to being a scale of 1.

The work-around I’m using for this, isn’t too great either, I have assigned an OnFinished event to set the visibility, but this is less than ideal and sometimes the scale visibly flicks back to 1 before being hidden.

Another animation bug I noticed, again in UMG, not sure about anything else, is that if there are multiple layers inside of the animation, say one for colour changing, and one for transform. If the animation was 1sec long total, but colour changes from 0 to 0.5 and transform changes from 0 to 1, the animation will actually stop at 0.5. If I made that layer end at 0.75, the animation stops at 0.75 etc.
The solution was to drag that layer’s end point to 1.0 where the end of the overall animation is.
This happened on my scoring numbers, when players would get a point, the score would enlarge, wiggle, then return back to it’s normal size, all while changing colour to represent if they earned points or lost points, but the animation would just get stuck at the peak, where the number was enlarged and kind of at an angle due to the wiggle animation.

I did notice when looking at the UserWidget.cpp file that “bRestoreState” is a new parameter inside the PlayAnimation function, but true or false, this doesn’t seem to matter.
I understand bRestoreState is used in LevelSequences, and have made sure that the “KeepState” option is chosen for the camera sequence, but it doesn’t seem to matter.

Is there something new since 4.23 that I am missing that resolves these issues? Or should I do a bug report?

[Ixiguis]

@Mavmat

Hi , I’ve just submitted a report.

Hi Mavmat, is there a link to the UE bug report? I’d like to upvote. I’m getting the exact same issue. Using voxel plugin + volumetric clouds here.

[unit23]

Upgraded to 4.26 from 4.25, generally was one of the smoother engine upgrades for me. There are now a few more yellow warnings, and had one error about a corrupted texture reference (error malformed tag), explained here. The first thing I’ve noticed, lightning appears much more realistic.

[Otreum]

Found another problem in 4.26
Sometimes when exiting the shipping build of the game, the process continues to run and has to be manually shut down.
I thought it was a Steam related problem, so I rolled back to STEAM SDK 1.46 (From 1.50), which didn’t work, then I just ran the game without Steam open and the same problem occurred.
I’m going to roll back to 4.23.1 today and I’ll deal with the bugs it had until a more stable build comes out.

[unit23]

Renamed a folder and this happened. The meerkat folder contains a subfolder with groom, which since has vanished. Also not able to move or copy groom assets. To replicate, migrate the meerkat folder to your project.

[motorsep]

@Otreum

Found another problem in 4.26
Sometimes when exiting the shipping build of the game, the process continues to run and has to be manually shut down.
I thought it was a Steam related problem, so I rolled back to STEAM SDK 1.46 (From 1.50), which didn’t work, then I just ran the game without Steam open and the same problem occurred.
I’m going to roll back to 4.23.1 today and I’ll deal with the bugs it had until a more stable build comes out.

Before you roll back, care to submit official bug report for this issue ?

[unit23]

Bug Fix: We now validate bound events at compile time to ensure that the owning component has not been removed from the Blueprint. This may throw Blueprint Warnings in existing assets and exposed events that were bound, but never called. The error will read " does not have a valid matching component".

Can someone explain this a little more, how can this be fixed? I have several of these errors for widget things, like buttons, how are those ‘bound’.

[Otreum]

@motorsep

Before you roll back, care to submit official bug report for this issue ?

Sadly I didn’t see this until after I rolled back.

I won’t do a bug report just yet as I’m thinking it could even be the WM Input Manager plugin or another 3rd party plugin like Victory Plugin.
Those 2 plugins were the only ones I updated when I went to 4.26, so could be one of those 2 causing the issue.

I might just try creating a base project, compiling it, and testing it out. If THAT fails (without plugins etc), then I’ll be sure to submit a bug report

[unit23]

So I’ve never used movies before but I have a few inside the Content/Movies folder but Unreal is not showing them, when adding filenames manually it says the file does not exist. When using the browse feature to add a startup movie it says MPEG-4 mp4, but mine is h264 codec and that’s also suggested as optimal in the docs.

https://answers.unrealengine.com/que…terrupted.html

I can play these video clips with the media player, np.