Unreal Engine Issues
Unreal Engine Issues
On Hit Events are inconsistent/inaccurate when using Substepping most notably at lower frames per a second
UE - Runtime - Simulation - Dec 9, 2021This is a regression Tested in: //UE4/Release-4.27 CL18319896 Binary //UE5/Release-5.0-EarlyAccess CL16682836 Binary Under the same conditions in UE4 the On Hit events fire accurately and as expect ...
"PivotPainter_PerObjectData" node's "Random Value Per Element" output crashes with an assertion when used with a "Cross" node
UE - Rendering - Architecture - Materials - Jan 31, 2022This is a regression. Tested in: //UE4/Release-4.27 CL18319896 Binary //UE5/Release-5.0 CL18747223 GitHub When using the Random Value Per Element from a PivotPainter_PerObjectData with a Cross nod ...
Update Mesh Section incorrectly sets vertex colors for a Procedural Mesh
UE - Graphics Tools - Modeling Tools - Jun 21, 2022This is a regression tested in //UE4/Release-4.27 CL#18319896 Update Mesh Section incorrectly sets vertex colors for a Procedural Mesh. The closer a colors R, G, or B value is to 1.0 or 0.0 the mor ...
Cannot instantiate an InstancedStaticMesh component with ConstructionScript
UE - Graphics Features - Jul 21, 2024Starting with Unreal Engine 5.4, the logic for adding ISM instances by adding ISM components in the Construction Script (like below) has failed. [Image Removed] This issue accidentally was introd ...
3D Grass may not appear in Path Tracer renders
TM - Rendering - Sep 19, 2025Reported in SF [Link Removed] Path Tracer renders of images with 3D grass may not display 3D grass in the foreground of an image. The 3D grass material will not appear or may appear to cut off at s ...
FStateTreeExecutionContext::GetDebugInfoString() outputs wrong info and crashes when using linked state trees
UE - AI - Debugging - Apr 17, 2025When 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, ...
Actor appears hidden in editor viewport until moved to different sublevel
UE - Gameplay - Mar 9, 2016User's blueprints disappear from level during editing with no warnings, errors, messages, or additional information. They return to visible if they are moved into a new sublevel and appear during PI ...
No scroll bar is created when the Collision Preset section of Project Settings is expanded
Tools - Mar 15, 2015No scroll bar is created when the Collision Preset section of Project Settings is expanded. Clicking an element in the Preset section does not add the scroll bar. Collapsing the section and re-exp ...
Warnings displayed when launching the editor in DX12
UE - Graphics Features - Oct 6, 2016Following warning is displayed in the log when launching in dx12:[2016.10.06-22.33.36:185][ 0]LogD3D12RHI:Warning: Root signature created where the root parameters take up 18 DWORDS. Using more tha ...
Undo in Skeletal Mesh Editor causes model to disappear
UE - Gameplay - Nov 9, 2016I can across this issue when I was Ad Hocing and wanted to pose a skeletal mesh in a certain way. I imported one into my project and moved a bone, then undo and it was gone. I wanted to check if it ...