Unreal Engine 5.1 Preview

Rexuyo · October 19, 2022, 2:38pm

In Preview 2 the number of material instructions with SM6 enabled is crazy, 545 for an empty landscape material (RVT plugin enabled). It appears in red in shader complexity visualizer even when empty And this is not listed in the list of things to fix for the final release!

TreeGame · October 19, 2022, 3:00pm

snap animation not working (5.1 p2)

pedgarvic · October 19, 2022, 3:09pm

Hi all,

I am having troubles rendering senquences from command line. When I use the exact same command as in the previous version (5.0.3) I just get a black screen and the game keeps in “Not responding”.

Someone with the same problem?

CarloAlt · October 19, 2022, 5:59pm

Crash trying open/edit Water Waves BP (5.1 Preview 2)

Assertion failed: LandscapeSubsystem [File:D:\build++UE5\Sync\Engine\Plugins\Experimental\Water\Source\Runtime\Private\WaterSubsystem.cpp] [Line: 298]

UnrealEditor_Water
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_AdvancedPreviewScene
UnrealEditor_WaterEditor
UnrealEditor_WaterEditor
UnrealEditor_WaterEditor
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor_WaterEditor
UnrealEditor_WaterEditor
UnrealEditor_Slate
UnrealEditor_Slate
UnrealEditor_Slate
UnrealEditor_Slate
UnrealEditor_Slate
UnrealEditor_Slate
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor_WaterEditor
UnrealEditor_WaterEditor
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor_ContentBrowserAssetDataSource
UnrealEditor_ContentBrowserAssetDataSource
UnrealEditor_ContentBrowserAssetDataSource
UnrealEditor_ContentBrowser
UnrealEditor_ContentBrowser
UnrealEditor_ContentBrowser
UnrealEditor_ContentBrowser
UnrealEditor_ContentBrowser
UnrealEditor_ContentBrowser
UnrealEditor_ContentBrowser
UnrealEditor_Slate
UnrealEditor_Slate
UnrealEditor_Slate
UnrealEditor_Slate
UnrealEditor_ApplicationCore
UnrealEditor_ApplicationCore
UnrealEditor_ApplicationCore
UnrealEditor_ApplicationCore
user32
user32
InkObj
atlthunk
user32
user32
UnrealEditor_ApplicationCore
UnrealEditor
UnrealEditor
UnrealEditor
UnrealEditor
UnrealEditor
UnrealEditor
kernel32
ntdll

Guillaume.Abadie · October 19, 2022, 7:43pm

r.TSR.History.SeparateTranslucency changed in 5.1. Wondering if that what you are hitting?

Jeff_Sperandeo · October 20, 2022, 3:20am

Check the product roadmap

In 5.1 they add support for exp fog and sky atmospheric fog. As for volumetric clouds, path tracing will be coming in the future.

IronicParadox · October 20, 2022, 4:37am

Finally figured out how to get rid of the weird VSM shadow problems that I was having where the player’s shadow would leave weird broken shadow fragments on the ground that would eventually go away.

I had to clear out the C:\Users\USERNAMEHERE\AppData\Local\UnrealEngine\ folder and I think I also cleared the C:\Users\USERNAMEHERE\AppData\Local\NVIDIA\DXCache\ folder just to make sure.

The fragments of shadows would get left behind almost like decals and weren’t some kind of temporal issue. If you stood still, you could move the camera all around and they’d persist. You had to move far enough away to finally get them to go away.

Guess it was some kind of shader or cache issue. Might be helpful to double check the source to make sure it’s invalidating older shaders or something like that.

saurabhguptarock · October 20, 2022, 5:18am

When I enable nanite for foliage in 5.1 Preview 2 the trees starts flying.

CarloAlt · October 20, 2022, 6:27am

Disable wind in foliage materials if you can. It happens in some foliage types with World Position Offset not set correct for UE 5.1.

Krabworks · October 20, 2022, 12:10pm

I love this bug lol

bruno_pierron · October 20, 2022, 9:11pm

In 5.1 preview2
Static mesh with several materials slots do not return the physical material asigned to the material instances assigned to the static mesh.

Bencsizy · October 20, 2022, 10:13pm

Could you please confirm if it works on your side? It would be crucial for our project.

david.gillespie · October 21, 2022, 12:25am

Has anyone been able to confirm:

if iOS forward rendering works in 5.1
is AR functionality such as image tracking on iOS? - I’m expecting that this still hasn’t been fixed however it’s always worth asking

Dojo · October 21, 2022, 8:47am

currently UE5 does not work properly with “Layered Materials”. The layered materials required the heightmaps to be stored in the displacement slot inside a “layer blend” in order to use nodes like “heightlerp”. Technically not a bug but rather something that probably got overlooked when they deleted the displacement/tesselation pins on the materialattributes.

imica-nice · October 21, 2022, 1:06pm

UE 5.1.0 Preview 1 + Nanite + VR Oculus = Very Good
UE 5.1.0 Preview 2 + Nanite + VR Oculus = Very Bad (can’t use)

OptimisticMonkey · October 21, 2022, 1:45pm

In 5.1P2, Package Build of stock Third Person Template very slow (5 fps)

(I enabled SM6 For DX12, as required for VSM support )

Log has endless:
[2022.10.21-13.39.32:875][ 0]LogRHI: Display: Encountered a new compute PSO: 95856658
[2022.10.21-13.39.32:875][ 0]LogRHI: Display: New compute PSO (95856658) Description: 12A8B6058B697BD9808C576763A7B7B412D87B4E
[2022.10.21-13.39.32:875][ 0]LogRHI: Display: Encountered a new graphics PSO: 943418568
[2022.10.21-13.39.32:875][ 0]LogRHI: Display: New Graphics PSO (943418568)
[2022.10.21-13.39.32:875][ 0]LogRHI: Display: A4B0E647434051D509F0E24552BBA4203AEF90D4,DEDE42CD9558BC4B3F65C1E55A0F5D6A6FA3B708,0000000000000000000000000000000000000000,0000000000000000000000000000000000000000,0000000000000000000000000000000000000000,<0 1 0 0 1 0 15 0 1 0 0 1 0 15 0 1 0 0 1 0 15 0 1 0 0 1 0 15 0 1 0 0 1 0 15 0 1 0 0 1 0 15 0 1 0 0 1 0 15 0 1 0 0 1 0 15 1 0>,<0.000000 0.000000 2 1 0 1 0>,<0 3 1 7 0 0 2 0 7 0 0 2 255 244>,1,11,524,1,1,1,1,0,7,10,0,0,0,18,0,0,0,2,0,0,0,2,16,0,0,19,0,0,0,2,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,15,<0 0 3 0 12 0>,<1 0 5 1 8 0>,<1 4 5 2 8 0>,<2 0 12 5 4 0>,<2 0 12 6 4 0>,<2 0 12 7 4 0>,<2 0 12 8 4 0>,<3 0 8 13 0 0>,<4 0 6 3 16 0>,<4 4 6 14 16 0>,<4 8 7 4 16 0>,<4 12 7 15 16 0>,<5 0 20 16 0 1>,<6 0 3 9 0 0>,<6 0 3 10 0 0>,<0 0 0 0 0 0>,<0 0 0 0 0 0>
[2022.10.21-13.39.32:875][ 0]LogRHI: Display: Encountered a new compute PSO: 962314663
[2022.10.21-13.39.32:875][ 0]LogRHI: Display: New compute PSO (962314663) Description: A7C15B393FC9943C3B7B65FCA38BEFF9620C103C
[2022.10.21-13.39.32:875][ 0]LogRHI: Display: Encountered a new compute PSO: 3584104151
[2022.10.21-13.39.32:875][ 0]LogRHI: Display: New compute PSO (3584104151) Description: D716A1D598702DC988CDEF2D29CED2A5EE081ED8
[2022.10.21-13.39.32:875][ 0]LogRHI: Display: Encountered a new compute PSO: 1772400617
[2022.10.21-13.39.32:875][ 0]LogRHI: Display: New compute PSO (1772400617) Description: E9AFA46907EA2E5312B567A5383C7E05CED787BC

Editor FPS for same scene is fine

[UPDATE - RESOLVED] Deleted package, switched project to VS2022, repackaged - seems fine now ?!?!?

Rexuyo · October 21, 2022, 3:00pm

The feature isolating the selected node path in the Material Editor by dimming nodes not on the path can be useful but is impractical as currently implemented in preview 2, the dim factor is too high, hindering readability of other nodes. Please make this configurable.

CarloAlt · October 22, 2022, 9:26am

Probably a stupid question.
Will we have reflections and shadows from Nanite models in the future other than those of his Fallback?
I think no.

UElaci · October 22, 2022, 9:31am

Using large amount of spatial samples in movie render queue will eat away all ram and crash gpu.

Same goes for highResShot + screenshotdelay + large amount of spatial samples.

This does not happen in editor viewport though so I guess this isn’t normal behavior.

EDIT: In 5.0 the issue doesn’t appear, at least not when taking high res screenshot(RAM usage won’t increase a bit). In MRQ renderings it does, large amount of spatial samples will increase RAM(not VRAM) usage a LOT.

Dayne124 · October 23, 2022, 7:12pm

In 5.1 Preview 2 Packed Level Actors don’t work properly and miss the “Packed” tab. Also when selecting them in Viewport they don’t behave like one object and split into instances which makes them unusable.

.