Unreal Engine Issues
Unreal Engine Issues
Failed to launch project with -D3D10 Command Line Argument
UE - Graphics Features - Jun 3, 2019Adding the d3d10 command line argument to a package project results in a crash. This worked normally in 4.21 and below. ...
GAS: FActiveGameplayCueContainer::RemoveCue crash while iterating removals when consecutive Cue tags are conditionally added and the conditional effects removed in ascending order
UE - Gameplay - Gameplay Ability System - Nov 4, 2025When removing gameplay effects by tag, if the tag that is being removed has other tags that are dependent on it in a cyclical way an "array out of bounds ' error can be triggered. ...
Zooming in UMG preview doesn't scale text block margin
UE - Editor - UI Systems - May 20, 2015Zooming in UMG preview doesn't scale text block margin [Image Removed] [Image Removed] ...
UDN: ChildBP - When replacing Static or SkelMesh Compoent inherited from the Parent Class, Socket list doesn't update
UE - Gameplay - Blueprint - May 21, 2015This is simple, but maybe hard to explain, so hear with me. I've attached a sample project and Repro Steps below in case it's not clear. Basically: 1. Make BP_Parent with an unassigned Mesh (Stati ...
Import FBX of Maya to Matinee seems converting incorrect location (coordination)
Tools - May 22, 2015Import feature of Matinee seems converting incorrect location (coordination) if importing Maya animated FBX that exported StaticMeshes from UE4 editor. Sometimes licensee asks this kind of coordina ...
Converting Texture Sample to Parameter when MipValue set to "Level" or "Bias"
UE - Rendering - Architecture - Materials - May 27, 2015When a Texture Sample's MipValue is set to something other than "none" (which adds the extra pin), attempting to convert that Texture Sample to a parameter will cause the Editor to crash. (Simple r ...
Turning off Apply Wind after switching tabs crashes editor
OLD - Anim - May 27, 2015In the Skeletal Mesh editor, turning Show>Clothing>Apply Wind while switching tabs causes a crash. For example, turn it on while in the Mesh tab. Switch to Animation Tab and then back to Mesh. Turn ...
Cannot softly vertex paint blend weights with a 4-node blend material
Tools - Jun 15, 2015Video attached. If you make a 4 node blend material like so: [Image Removed] When you try to paint blend weights, the color you paint instantly jumps to the maximum value, and there's no way to p ...
Indirect Lighting Transition is delayed one frame.
UE - Graphics Features - Apr 29, 2016If you let objects move quick like teleport, you can see the transition is delayed one frame. This problem occurs even if r.Cache.SampleTransitionSpeed increase, and Both ILCQ_Point and ILCQ_Volume ...
Indirect lighting cache generates points inside interpenetrating static meshes
UE - Graphics Features - Jun 10, 2015Seems to be an issue with the indirect lighting cache where if you have interpenetrating static meshes (for example static mesh rocks that make up the ground), there are cases where the cache points ...