Unreal Engine 5.1 Preview

jon_eg · October 10, 2022, 11:14pm

Yes, there was a bug w/ path tracing in shipping builds in 5.0 that should be fixed in 5.1. Can you give it a shot?

BoBoMX · October 11, 2022, 1:50am

Nanite works by auto-LoD merging adjacent triangles in runtime.

For foliage, which is considered aggregation geometry, It need to merge leaves which is not adjacent triangles. Nanite currently cannot handle this yet.

Arkiras · October 11, 2022, 2:23am

Nanite has a new feature in 5.1p called “Preserve Density” in the mesh nanite settings that will resolve this issue. I imagine it comes at a performance cost though.

POV70 · October 11, 2022, 7:57am

Hi,

yes I am having the same issues on my M1 Mac Ultra. Not usable for me at this state.

tc22_LEOCHOU · October 11, 2022, 10:56am

Path tracing & raytracing seem not work for me too in 5.1 pr1!
How to solve ? (RTX 2080TI) seem turning is disable in this version?

CounteofMonteCristo · October 11, 2022, 12:02pm

yeah I reverted back to 5.0.3 for now. it was fun to try out the new anamorphic capabilities on the camera though

Arkiras · October 11, 2022, 12:33pm

Do you have the RenderDoc plugin enabled? That was what was preventing hardware raytracing from functioning in 5.1p for me.

z0ulzi · October 11, 2022, 5:05pm

UE5.0 120 fps , UE5 5.1 preview = config … 30 fps ; (

where is the improvement?

SpideyComic_1511 · October 11, 2022, 5:32pm

There will be hotfixes soon, hopefully.

jkinz3 · October 11, 2022, 7:58pm

I got 5.1 and now this pops up whenever my character runs up against anything. Is this a bug or a known issue?

lucoiso · October 11, 2022, 9:08pm

Same here.

Fixed by setting p.CVarGeometryCollectionImpulseWorkAround to false

In the function ApplyImpactPhysicsForces (CharacterMovementComponent.cpp:7019) the movement component is trying to add impulse to all objects the player touch because bGeometryCollectionImpulseWorkAround (CharacterMovementComponent.cpp:284) is true by default and bCanBePushed = false (CharacterMovementComponent.cpp:7065) isn’t being called.

tc22_LEOCHOU · October 12, 2022, 2:50am

still now work

Arkiras · October 12, 2022, 2:52am

You need to DISABLE it, sorry if that wasn’t clear.

Andrej730 · October 12, 2022, 10:04am

Can anyone please check whether this option “Ordered Independent Transparency Enable” is available in Project Settings in UE5.1 Preview build?

Andrej730 · October 12, 2022, 1:45pm

It is available if anyone curious.

yoyomadafaka · October 12, 2022, 5:28pm

anyone tested nanite foliage? I have huge drop fps when shadow is on, if turn off shadow fps back to normal, it is normal? I not have RTX GPU

z0ulzi · October 12, 2022, 9:37pm

It is not yet well implemented, it should be 5.1 Release.

UElaci · October 13, 2022, 7:46am

Hey guys, is there a known issue with datasmith importing .glb/gltf in UE5.1? It doesn’t seem to import instances.

I use blender to export .glb since there is no .blend support in datasmith and it worked fine in 5.0 but now it only imports single meshes and empty actors in place of instances.

motik_it · October 13, 2022, 3:51pm

Exponential Height Fog in the path tracer seems still not supported in this 5.1 preview isn’it?
Thank you!!

motik_it · October 13, 2022, 6:24pm

By disabling Reference atmosphere in PostPVolume, you get VolumetricClouds back with path tracing, if you have SkyLight in your scene with Real Time Capture enabled. If you change Cubemap resolution you get nice clouds - so if you want vol Clouds you loose sky atmosphere fog, and vice versa.
Exp Height for it seems not working at all at the moment with path tracing.