Unreal Engine Issues
Unreal Engine Issues
Custom Node plugged into World Displacement cannot convert from FMaterialTessellationParameter to FMaterialPixelParameter
UE - Graphics Features - Nov 30, 2015Custom Nodes plugged into World Displacement are yielding:Error [SM5] error X3017: 'CustomExpression1': cannot implicitly convert from 'struct FMaterialTessellationParameters' to 'struct FMaterialP ...
D3D12 Does Not Correctly Validate Static Uniform Buffers Correctly
UE - Rendering Architecture - RHI - Feb 12, 2025When adding a Uniform Buffer Struct that has one 4x4 matrix to a mesh pass, validation will fail, due to a Uniform Buffer Struct mismatch. This can be reproduced by adding a mesh pass in project-si ...
Input pin disappears if split on GetScreenSpacePosition node
UE - Gameplay - Blueprint - Jun 16, 2015If the input pin of a GetScreenSpacePosition node is right clicked and then the user presses "split struct pin", the pin will disappear. Workaround: Press refresh node in RMB context menu. ...
Chinese translation is incorrect in some situations in the Editor
UE - Editor - UI Systems - Localization - Apr 23, 2019A user has reported that the Chinese localization of some editor elements are not correct. They mentioned that there are some words that are used that may be an appropriate replacement in some situa ...
Replicated Timelines Update runs once for Clients when you change its Play Rate
UE - Networking - Apr 22, 2022See linked UDN for more info. This looks to be because of how OnRep_Timeline handles any changes to the component's FTimeline struct. If the timeline isn't playing, OnRep_Timeline will call SetPlayb ...
Structures get broken after saving and reopening project
UE - Gameplay - Nov 12, 2018When a project is reopened that contains structures, they will be corrupted with a hash code instead of their original values. If the "Break Struct" node is removed it can't be re added as it is not ...
STAT_AI_BehaviorTree_InstanceMemory is sometimes wildly inaccurate
UE - AI - Jun 10, 2020From the UDN thread: Turns out this is caused by the way this stat was implemented for the FBehaviorTreeInstance struct: 1) You call IncMemoryStats on construct, before the struct is populated with ...
Crash when changing an actor's variable type from vector to transform
UE - Framework - LWC - Oct 25, 2022It looks like this is some fallout from CL 19405683. If we change a variable from vector to transform, it'll pass this check:if(Tag.StructName == NAME_Transform) { Struct->SerializeTaggedProp ...
Crash when mousing over array parameter in Blueprint function graph while debugging
UE - Gameplay - Blueprint Editor - Mar 3, 2020Mousing over an array input inside a Blueprint function can lead to a crash. For this to occur, the first parameter of the function must be a User Defined Struct. ...
Crash when trying to find references to blueprint Structure node
UE - Gameplay - Blueprint - Oct 12, 2015Right clicking on a struct node inside a blueprint and selecting the "Find References" option will cause the editor to crash Crash Reporter: [Link Removed] ...