Chaos Cloth - Fictitious Angular Scale is acting up when the cloth is teleported

UE - Simulation - Physics - Character - Apr 30, 2024

The Fictitious Angular Scale is still having an effect when the cloth is teleported.  Also it shouldn't have any effects when the velocity scale is set to 1 (as per tooltip documentation) but it doe ...

Preferred Angles Don't Work on Manny Thigh

UE - Anim - Rigging - Apr 29, 2024

Color shifting occurs from screen probe gather ping-pong when Lumen active

UE - Graphics Features - Lumen - Apr 29, 2024

A subtle yellow tint color shift occurs when Lumen is active due to usage of R11G11B10_Float targets, mostly from r.Lumen.ScreenProbeGather.SpatialFilterProbes where we ping-pong between R11G11B10_F ...

[AI] Crash in UGameplayDebuggerLocalController::OnDebugDraw

UE - AI - Debugging - Apr 27, 2024

UGameplayDebuggerLocalController::OnDebugDraw crashed with a dereferenced nullptr for CachedReplicator. ...

Unnecessary warning "LogChaosCloth: Warning: Invalid pattern data. Num pattern indices 0 != Num welded indices"... for all SKM cloth

UE - Simulation - Physics - Character - Apr 26, 2024

This warning is technically correct, panel-based cloth is disabled, but it's expected and there's nothing the user can actually do about it. This comes from a UDN. ...

GPU Crash in Niagara Fluids template when WorldSpaceSize has a component at 0

UE - Niagara - Apr 26, 2024

The NiagaraFluids plugin provides several Niagara System templates to use as a starting point for the user's own Systems. The templates in category "3D Gas", such as "Grid 3D Gas Explosion", include ...

Crash editor when raytracing is enabled and enter kanji characters into TextRenderActor

UE - Graphics Features - Ray Tracing - Apr 25, 2024

The editor crashes when entering Kanji characters into TextRenderActor with raytrace enabled. This does not happen with English text.  ...

OnlyTickMontagesAndRefreshBonesWhenPlayingMontages visibility option updates anim instance multiple times

UE - Anim - Runtime - Anim Blueprints - Apr 25, 2024

The OnlyTickMontagesAndRefreshBonesWhenPlayingMontages setting added in 5.4 is broken.  It only works because it unintentionally forces a second call to UAnimInstance::UpdateAnimation (via RefreshBo ...

Switching between play / simulate in vcam can cause editor to crash.

UE - Virtual Production - Tools - Pixel Streaming - Apr 24, 2024

Originated from UDN case: [Link Removed] ...

Using "Change Class" on Spawnables, Possessable references retain old Class info

UE - Anim - Sequencer - Apr 22, 2024

Changing Class for Spawnable objects in Level Sequence did not have any impact on Possesable objects in Subsequence. It's still referencing the previous Class. Also found in Release-5.4, CL: 329753 ...