Unreal Engine Issues

Volumetric Cloud + Sun ghosting artefacts around a static cube

Video of the issue here - [Link Removed] 4.27 and 5.0 seem to display slightly different outcomes. In 5.0 the sun only appears very close to the cube, whereas in 4.27 is can appear a bit further ou ...

Variant manager crash in UPropertyValue::HasValidResolve

in the past we have reported a lot of VM related bugs which got fixed over time. Unfortunately, I think we have another one. Right now we're using 5.0.3 binaries from the launcher. Now the pro ...

Package Failed with VS2019

Error Log: UATHelper: Packaging (Windows (64-bit)): CSC : warning CS1685: The predefined type 'System.Runtime.CompilerServices.ExtensionAttribute' is defined in multiple assemblies in the global al ...

Editor crash when saving a level instance in a folder with the same name as the level

Apex Cloth disappears when Setting Custom Time Dilation to Zero

Apex Cloth assets disappear if you set the Custom Time Dilation to 0.0. You can workaround the issue by setting the Custom Time Dilation to 1.0, and then use the 'Force Cloth Next Update Teleport a ...

Engine crashes with AudioMixer if the sound is disabled in the system

Seems like failure to init SDL device is not being properly propagated and something on the higher level keeps pushing commands to the (non-existent?) audio thread. Paging also [Link Removed] and [ ...

Shader compiler errors when using enclosed local variables in a material while ray tracing is enabled

A licensee is seeing an issue with a couple of post process materials after enabling ray tracing. While the materials presenting the issue fail to compile for different reasons, they both refernce t ...

Shortcut(Function, Add a new function graph) leads to crash in the MacroLibrary editor.

Shortcut will still led to create a new function in the macro library. and this makes engine crash with following callstack. Assertion failed: Blueprint->BlueprintType != BPTYPE_MacroLibrary [Link ...

FStateTreeExecutionContext::GetDebugInfoString() outputs wrong info and crashes when using linked state trees

When using State Trees, the AI Debugger can be accessed during play to show information about their current execution state. If a behavior tree is currently in a state that references a linked tree, ...

Navmesh blocking representation for cylinders is wrongly offset when the mesh has IsDynamicObstacle=true

In a mesh asset, setting Navigation>IsDynamicObstacle=true will make the Navigation / Cylinder Collision projection appear in a wrong position. As described in the case, the fix should reside in Na ...