Unreal Engine 4.26 Preview

decksounds13 · November 17, 2020, 12:48am

porpho:

Hello Epic developers.

I just wanted to let you know how much we all appreciate you giving us access to the preview of Unreal 4.26 and how much we look forward to using it in our projects.

We understand that giving access to Beta software to a large group of users is a very tricky situation for any software and it’s particularly delicate for something as complex as Unreal and we are very, very grateful that we can look at the new features and familiarize with them beforehand.

We understand that Beta/preview software is not to be used in production and that it can corrupt existing projects. That is the norm with every beta software and we will use these previews only on copies of projects that can be lost without affecting our schedule and work.

These are exciting times for visual creatives around the world. I’m still in disbelief that we have free access to something like Unreal. I really feel that this is the golden age for visual artists.

Thank you from the bottom of my heart for making Unreal and for letting us play with it.

–
Paolo Ciccone
Charleston, SC

I concur, it’s probably one of the most incredibly complex softwares out there. It’s a privilege to use.

BernhardRieder · November 17, 2020, 3:47am

Same here:
INSTANT CRASHINGS… can’t even launch an empty new project from scratch with PREVIEW 7.
Un-installed, re-installed, verified. Nothing that would change the crashes.
Some bad code must have been integrated into PREVIEW 7.

Thanks for all your hard work on updating and fixing!
appreciate it and keep rocking!
cheers

decksounds13 · November 17, 2020, 8:26am

The variant manager doesn’t seem to be opening in preview 7.

NilsonLima · November 17, 2020, 11:33am

Just a reminder to all which are testing the preview 7 and are having crashes, there are things to consider when reporting bugs which is state GPU driver version and OS version when Windows, because it will impact how UE4 will behavior and usually the latest engine is tested with latest release of all the related tech including kits for Android, iOS, VR and AR, so mentioned those software stack versions also help identifying bugs or having the environment to replicate them.

decksounds13 · November 17, 2020, 7:21pm

This is weird… raytraced shadows seems to disappear on some painted foliage actors when the camera gets close but not on all. Here is an example, the same model viewed from different distances. Notice the instance on the far-right retains it’s shadow up close while the others’ shadows disappear. Very strange… I should note, there are no LOD’s on this model either. Raytraced two-sided shadows are on. Painting more foliage seems to change which instances have shadows and which don’t.

EDIT: NM, this cvar took care of it :r.RayTracing.Geometry.InstancedStaticMeshes.Culling

TFA_aaronfhd · November 17, 2020, 11:52pm

Geting TCP_wrapper Error on Linux builds.

Hoping to see more linux support

BernhardRieder · November 18, 2020, 6:44am

Is it not possible to release your updates automatically with the Epic Game Launcher instead of GitHub Downloads?
Would make it much easier. Especially if it’s just in PREVIEW Mode.

And, it would be also great, if in the Epic Launcher you would have the options to roll-back to older Preview Versions.

anonymous_user_b477c9ac · November 18, 2020, 7:59am

Does anyone else get issues with using the material only custom brush and lakes?. When trying to edit the lake all I get is either the noise overtaking my flattening/edit layer or the lake overflowing as if the noise was still there. My storage is also draining from 11gb to a few MB before UE4 crashes completely.

anonymous_user_b477c9ac · November 18, 2020, 9:13am

This post has been deleted.

anonymous_user_260ecef2 · November 18, 2020, 9:26am

I continued attempting to find a way around the lack of Emissive and Opacity Mask support for Hair strand rendering but no dice.

Even with an extremely simple material, hair strand rendering completely ignores Emissive and Opacity mask inputs as shown in the below image.

](filedata/fetch?id=1833622&d=1605691195)

Since these are two extremely commonly used material inputs in many different use cases, I have to assume this is a bug and I submitted a report for it. If any of you wonderful wizards around here or an engine developer can give some insight on if there is a work around or if this will be fixed, I’d be extremely grateful. Without hair strands supporting these two material inputs, I wont be able to use them in my current project so I would like to know what’s up with their omission.

I figure since Hair strands are intended to be production ready in this version, that this is the best time to bring this limitation/bug up to the engine team.

anonymous_user_414ef2d8 · November 18, 2020, 10:56am

Cannot use GPU Lightmass plugin with Preview 7. Crashes on launch. Is there no way to revert to preview 6? I really needed to experiment with this.
Also, the Github tree for UE4 seems… gone?
https://github.com/EpicGames/UnrealEngine/tree/4.26.0-preview-6

This link doesn’t work for me at all.

NilsonLima · November 18, 2020, 11:58am

You need to have your UE4 account linked to a GitHub account in order to see the link (it works fine for me). You do it by creating an user at GitHub and then using that user information and mention at your user profile where it asks to connect to GitHub in this link: Epic Games

lucien70 · November 18, 2020, 12:41pm

Hello
how does Chaos Cloth work ?
does it replace Apex cloth ?
Can chaos cloth collide with the environment ?

WilliamFaucher · November 18, 2020, 1:12pm

Well now I feel silly. Thanks for the help!

NilsonLima · November 18, 2020, 5:11pm

Not at all, that is more of a common issue than you think, but remember also that you need to be logged in with GitHub always in order to see the link, otherwise you will receive the same error.

BernhardRieder · November 18, 2020, 5:16pm

Using Visual Studio to build the preview takes a long time. Anything I am missing to speed up that process?
Took about 3hrs to build.

MothDoctor · November 18, 2020, 5:27pm

Except for upgrading hardware? Not much

muchcharles · November 18, 2020, 7:42pm

Make sure to use an nvme drive if possible. With a 3950X and decent nvme it builds in around 14-15min.

neighborlee · November 19, 2020, 3:48am

Using preview 7 and enabled dx12 , gpu LIGHTMASS and ray tracing , but on trying to start project I get
LoginId:c3f065d24ed76cada9dca2a911fc515b
EpicAccountId:22e5ac31a7334c5695c9986f0d9d2c9d

Fatal error: [File:D:/Build/++UE4/Sync/Engine/Source/Runtime/Engine/Private/ShaderCompiler/ShaderCompiler.cpp] [Line: 5232] Failed to compile global shader FStationaryLightShadowTracingRGS . Enable ‘r.ShaderDevelopmentMode’ in ConsoleVariables.ini for retries.

UE4Editor_Engine
UE4Editor_Engine
UE4Editor_Engine
UE4Editor_D3D12RHI
UE4Editor
UE4Editor
UE4Editor
UE4Editor
UE4Editor

ntdll

Known issue ?

hidayetcifci · November 19, 2020, 8:02am

Hi. Can’t you add a feature such as use LOD 0 of all scene objects when rendering to High Quality Media Export? Just like vray. While I can use multiple LODs while navigating the scene, I want to render only LOD 0 during rendering.