Unreal Engine Issues
Unreal Engine Issues
Trace to complex collision returns incorrect PhysicalMaterial
UE - Runtime - Simulation - Dec 15, 2022In ConvertQueryImpactHitImp, MaterialIndex is looked up from InternalFaceIndex, but FTriangleMeshImplicitObject:: MaterialIndices is an array by ExternalFaceIndex, so it returns incorrect material i ...
Xcode 26/16.4 Metal Toolchain generates metallib's that are not compatible with iOS 16
UE - Platform - Apple - Sep 23, 2025Below is the error output from FirstPerson template as a C++ project: {+}../../../FirstPerson58CPP/Content/firstperson58cpp_sf_metal_es3_1_ios-metal_es3_1_ios.0.metallib, 5881486 bytes!2025-09-23 1 ...
ACharacter JumpMaxHoldTime quickly prevents jumping on the server
UE - Gameplay - Blueprint - Sep 18, 2017-Character no longer jumps to full height when on client when setting maxholdtime to anything above 0 in character blueprint ...
LeapHandGrabbing comment is different than actual used value for hand grabbing.
UE - Platform - XR - Oct 24, 2016The comment for LeapHandGrabbing( ) states grab strength is 0.5 when HandClosed( ) only returns true when grab strength is equal to 1.f. ...
Error when attempting to generate an SSH key for remote building
Tools - Oct 7, 2016Error is displayed when attempting to generate an SSH key.Unexpected remote arg: [email protected]:.ssh/RemoteToolChainPrivate.key rsync error: syntax or usage error (code 1) at /home/lapo/packa ...
Changing the case of any node with a String input will not be saved
UE - Gameplay - Blueprint - Apr 20, 2016Changing the case of any node with a String input will not be saved User Description: Changing case of any string input in BP not accepted But the problem is still happened on any string input of ...
The getter/setter function bAllowRightClickDragScrolling incorrectly refers to AlwaysShowScrollbarTrack
UE - Editor - UI Systems - UMG - Aug 28, 2023UScrollBox::AlwaysShowScrollbarTrack has its own getter/setter function (SetAlwaysShowScrollbarTrack/IsAlwaysShowScrollbarTrack). In another property for UScrollBox::bAllowRightClickDragScrolling, ...
Reflections Not Behaving As Expected in Splitscreen
UE - Graphics Features - May 15, 2018In splitscreen, Player 0 view influences reflections for other player views. A user submitted the included test project showing the issue, and I have reproduced on 4.18.3 as well as 4.19.2 (see Spli ...
Using the "Keep World" scale rule can result in incorrect relative location when attaching actors
UE - Framework - Components - Dec 9, 2022This seems to happen due to a precision error when calculating the relative transform between the socket and the component being attached. Occasionally, one of the transforms will have a scale of (0 ...
BlendListByEnum assumes that enum values are sequential
UE - Runtime - Anim BP - Aug 26, 2024FAnimNode_BlendListByEnum assumes that values within a custom enum type are sequential (ie. the index 0 = value 0, index 1 = value 1). But this is not true of all custom enum types, for example: U ...