Switching raytracing console variable in runtime can crash engine.

UE - Graphics Features - Lumen - May 13, 2020

Licensee reported that is caused by missing ECVF_RenderThreadSafe flag in these console variable definitions. r.RayTracing.Shadows r.RayTracing.AmbientOcclusion r.RayTracing.Reflections Here is a ...

EditCondition doesn't work on C-arrays

Tools - May 13, 2020

Toggling a bool doesn't enable/disable the elements of the array similarly to how it does for TArray in the details panel. Static arrays should have the same semantics as TArray with regards to edit ...

Crash occurs loading a sublevel containing landscape with ray tracing enabled

UE - LD & Modeling - Terrain - Landscape - May 13, 2020

In raytracing enabled, When loading a sublevel containing landscape with LoadStreamLevel function following error is shown. Assertion failed: Pair != nullptr [Link Removed] [Line: 584] Licensee re ...

Steam API is disabled when playing in Standalone Game

UE - Online - May 11, 2020

The Steam API is disabled when playing a Standalone Game that was started using the Play button. REGRESSION: Yes Worked: 4.24.3 Binary CL-11590231 Broken: 4.25 Binary CL-13261010 I do not see this ...

UDelegateProperty define missing in DefineUPropertyMacros.h

UE - Foundation - Core - May 11, 2020

The following code should be added in defineUPropertyMacros.h #ifndef UDelegateProperty #define UDelegateProperty DEPRECATED_MACRO(4.25, "UDelegateProperty has been renamed to FDelegateProperty") F ...

Source Won't Build - UnrealInsightsCLI.cpp References Missing Header

UE - Foundation - Core - May 11, 2020

Line 9 in https://github.com/EpicGames/UnrealEngine/blob/4.25/Engine/Source/Programs/UnrealInsightsCLI/Private/UnrealInsightsCLI.cpp is '#include "TraceServices/SessionService.h" which used to be lo ...

Use of SpiralBlur-SceneTexture MaterialFunction in translucent material results in compile errors

UE - Graphics Features - May 8, 2020

This appears to be new in 4.25. ...

Instance Synced properties in Blackboard cause a crash

UE - AI - May 8, 2020

Using an Instance synced property in a Blackboard causes a crash when exiting PIE. This is a regression from 4.24.3 (CL-11590370). This was reported and tested in 4.25 (CL-13144385). This was teste ...

[CrashReport] UE4Editor-NiagaraEditor!UNiagaraStackRendererItem::GetIconBrush() [NiagaraStackRendererItem.cpp:319]

UE - Niagara - May 8, 2020

Generated from CrashReporter Similar issue: [Link Removed] ...