Unreal Engine 5.0 Preview

General Announcements
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131

It can be caused if inside materials are used some material functions which are inside Megascans Plugin. And this plugin is not available for this version yet. You can make copy of your project and try this:

  1. Find Megascans Plugin folder for 4.27 version (inside your engine instalation directory “\UE_4.27\Engine\Plugins”).
  2. Inside your project folder create folder “Plugins”
  3. Copy folder “MegascansPlugin” from engine to “Plugins” folder inside your project folder.

When you start project you get UE warning, that plugin is for 4.27 and you must confirm that you want to load it anyway. Click “Yes” and you will see, if it will be better.

132

Whole IK Retargeter seems a bit buggy. When you wait to compression of retargeted animation it takes insanely long and no progress bar at all (short 9 sec animation).
And one thing i found really silly is, that you can’t use pose asset with already created default pose and you must make it (again) by hand. Some load pose asset (as is “Modify Pose” in old retarget options inside skeleton) would be really nice. It’s really annoying fiddling pose by hand again and again and again… Mainly if you can make it by script, save it as pose and then load it in sec. Oh wait, that’s no longer possible :slight_smile: .
I’ve tried set default pose inside skeleton, but i find out, that this settings are ignored by new IK Retargeter.

EDIT: Also seems that get fingers retargeting right with this with new pose setting in Retargeter it’s really tricky.

133

Hello,

Based on operating system compute the ScreenPercentage = 100 / (OS DPI Scale). For instance my OS DPI scale is 150% in the Windows display settings, so it will do ScreenPercentage = 100 / 1.5 = 66.66. This is quivalent to UE4’s Editor Preferences → Performance → Disable DPI Based Editor Viewport Scaling

Note you can also override the editor viewport screen percentage project settings in the Editor Preferences → Performance → Viewport Resolution.

134

Default screen percentage behavior in editor viewport & PIE has changed in UE5. If Switching AA method in the project settings, I recommend updating the default screen percentage behavior as well in the Project Settings > Editor Performance > Viewport Resolution

135

As I wrote, it is broken. I use 100% DPI scale (no scaling):
image
In such case, ScreenPercentage should end up divided by 1, therefore unchanged.

136

Compared to the Early Access version, I can’t find the option to enable the World Partition
export

Does anyone know how to do?

1 Like
137

It’s not in the first post, but I worked on an engine plugin called the Console Variables Editor during this sprint that I’d love to get some user feedback on. It allows you to save a preset of your often-used console variables and commands essentially granting you a control panel with sliders and other inputs to edit these values quickly. Enable it here and find it in the Tools menu at “Console Variables”:

cvarplug
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Runtime DataTable : Import and export game data to and from CSV or Google Sheets while your game is running!

GSheets Operator : Interface with Google Sheets, add new and delete old sheets, edit columns and rows, make in-game spreadsheets and more!

easyCSV : Read data from any CSV and put them in an easy-to-access string map!

iTween : Free, smooth, procedural object animation

4 Likes
138

Engine version is not showing up in my Launcher!

Edit: shows under 4.25, when you click on arrow, in the list menu. So weird… it was nerve wracking.

1 Like
139

Hey folks, appreciate all the feedback and information so far!

We’re taking notes on everything you’ve shared with us, and wanted to ask you to also complete bug reports for UE5.0, where applicable. Doing so gives our teams more context and information to help reproduce (and hopefully solve) what you’re seeing.

Thanks everyone

2 Likes
140

I feel ya on the tessellation, my company was using it on skeletal meshes to improve blendshape extreme deformations, we don’t do videogames, we do animation and sometimes is very important to have that extra geo on a close shot. The only help we received from UDN was, hey use more polygons on your models.

So now the rigging team and animation is suffering as hell for performance and we are implementing a LOD system to solve a problem we did not have before

3 Likes
141

It baffles me unreal removed tessellation since they seem to care so much about projects outside of gaming, where performance isn’t an issue. The workflow was far superior to anything we have right now. And a lot of what tessellation could do has no alternative still.

Honestly, it’s probably my biggest issue with UE5.

3 Likes
142

I can’t install 5.0 P1 I get # IS-MF01-5-5 error…

tried shutting down start up programs/ antivirus

and still get this error…

all pc drivers up to date

brand new Asus Z590

I9 11900k

rtx 2060

windows 10 21H2

This is annoying I can install 5.0EA but not 5.0P1

143

Installed preview 1 today, but when I went to open a project based in EA it automatically opened it in Preview version without any prompts. So I had to manually start EA, open a copy, and then recover broken assets/maps by inserting an autosave of those files from the original one. Extremely odd. Freaked me out for a minute since I thought the EA original was going to have to be completely reassembled.

Keep in mind I’m focusing on interior scenes at the moment. Yes the assets are assembled in a modular fashion, and I’ve increased distance field resolution on all of them. I’m mainly focused on Lumen so that’s where my notes go.

Couple nice things about Preview (which I also noticed in source builds for testing):

Some of the fireflies with Lumen seem to be resolved. Sometimes bright pixels will still appear at mesh intersections, edges and in normalmap cavities, so it appears like a different distribution of fireflies at least.

Distinct flickering artifacts when the camera is nearly parallel with a surface have been greatly improved.

Some improvement to light leaking through walls, even when they’re 25cm-50cm in thickness. I’ve been having that issue in EA2 — the main problem being when you have a single static mesh that has additional geometry (e.g support beams) close to the wall. Will have to do more tests but seems somewhat better.

Skylight contribution to global illumination appears [more] accurate

Issues and oddities:

Lumen GI reappearing as you move the camera around is a lot worse, even when cranking the Lumen Scene+Final Gather Update Speed up to 10. This is automatically a big strike since I was hoping Preview would be better not worse than EA. Similar to EA, Lumen fades out when 30-50m from a portion of the interior — but the card swimming is more obvious likely to the greater skylight contribution. Perhaps there’s cvars to help solve this?

Occlusion via Lumen seems overall more intense, and it’s sometimes hard to gauge exactly to what degree, due to the issue with splotches phasing around. Skylight reaches some areas but the bounces don’t seem to reach some other areas well.

Noticeable difference in direct light bounces, comparing EA to Preview. There’s a couple spots where bounces are absent/present. I can’t use the pathtracer in UE5, so I resorted to testing with Corona render. Some of the direct light GI actually looks more accurate comparing ground truth to EA … but I’ll have to do additional testing with an identical scene in Max. Support hardware raytracing mode doesn’t work, presumably since I’m on a 1070.

Big differences in fog/atmosphere but I haven’t done enough tests.

To summarize: I’d like to use Preview but EA still feels more stable, mainly regarding lumen scene. Having so many differences between EA and Preview doesn’t make it easy to pick.

144

skeleton rigs seem to be missing under skeleton retargeting, and I don’t see an alternative menu of any kind. I looked all over. Anyone able to find this? It was there in 5.0.0 EA

145

so i was able to get 5.0P1 to install but found some annoying issues from first open.

issues day1 in ue5 preview1 - YouTube

146

Hi , thank epic for update .

How to make it work with dlss plugin.

Edit: work with branch github

Capture

New viewport is cool ^^

147

One more thing, the preview doesn’t seem to compile with PhysX enabled (even though the doc says that 5.0 will support PhysX and that it’ll only be removed in a future version):

TargetRules.cs

public bool bCompileChaos = false;
public bool bUseChaos = false;
public bool bCompilePhysX = true;
148

That was doc to Early Access. You wont be able to use physx. It’s just not compatible with doubles.

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PhysX support in Early Access and beyond

Please note that we plan to deprecate PhysX from UE5 completely in a future release post 5.0.

Source:

150

Does anyone else has problems with RVT?
I have a Path rendert to the RVT over the Landscape, it start to jitter between both permanently changing what is rendered.
Anyone got a solution?

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