Unreal Engine Issues
Unreal Engine Issues
Macros from temporary diff blueprints can be placed and corrupt blueprint
UE - Gameplay - Blueprint - Feb 1, 2021Following the repro, a temporary copy of a BP Macro library is loaded into memory. When you right click to place a node, it incorrectly lists macros defined in this temporary library. They are fully ...
Compile Warning for Local TMap Variables
UE - Gameplay - Blueprint - Apr 12, 2017When using TMaps within a function in blueprints & then compiling the blueprint causes a warning to be created in the output log. In some test cases it only occurs with a local function TMap variabl ...
Push-model blueprint array property not properly marked dirty if modified by different actor
UE - Framework - Blueprint Compiler - May 17, 2023In KismetArrayLibrary.h, functions that modify the array property call MARK_PROPERTY_DIRTY(Stack.Object, ArrayProperty). Because these calls use the stack object and not the property's owner, modify ...
Persona code calling incorrect extenders when building menus.
OLD - Anim - Jan 25, 2017Certain files for building menus is calling the wrong extenders List of known conflicting functions:FSkeletalMeshEditor::ExtendMenu() [Engine\Source\Editor\SkeletalMeshEditor\Private\SkeletalMeshEd ...
Noise Node used in UI Material is rendering Black
UE - Graphics Features - Feb 15, 2016The Noise Node when used in a UI Material is rendering completely black in 4.11. This is a Regression from Behavior in 4.10.2 It looks like the Noise Node (at least form the preview of the noise i ...
Crash in FShadowSceneRenderer::AddDirectionalLightShadow
UE - Graphics Features - Shadows - Jun 2, 2025This is a race condition between the FShadowScene update & rendering, where sometimes the renderer tries to access a data array before it has been populated leading to the crash. It happens fairly r ...
Physics actor attached during runtime doesn't have proper collision
UE - Gameplay - Oct 14, 2015Physics actor attached during runtime doesn't have proper collision User Description: It seems that the "Weld Simulated Bodies" option on the AttachToActor function (same with AttachActorToActor) ...
Scaling blueprint component via gizmo breaks if axis scale reaches 0.0
UE - Gameplay - Blueprint - Oct 4, 2016Using the transform gizmo to scale a blueprint component will break the functionality if scaled to 0.0 and released. Workaround: If the scale value is directly set to non-zero value, gizmo can be u ...
Missing assignment/recursion in UHLODProxy::FindFirstActor can potentially lead to an infinite loop
UE - World Creation - Worldbuilding Tools - HLOD - Aug 13, 2018User reports on the forums of being stuck in an infinite loop and noticed a dead branch in the titled function:The body of if (SubLODActor) doesn't actually do anything, guaranteeing an infinite loo ...
YCoCg to sRGB?
UE - Niagara - Rendering - Mar 20, 2024Both the material and the Niagara compute shader use the same function to interpret the YCoCg color data, but the Niagara compute shader returns an incorrect color. Also found on CL: 32347737 in Re ...