Unreal Engine Issues
Unreal Engine Issues
Sphere Mask ArgInvHardness missing multiplication
UE - Rendering Architecture - Materials - Jun 27, 2025Hi Epic, In MaterialExpressions.cpp UMaterialExpressionSphereMask::Compile(), hardness is not calculated the same way in both <if> conditions. One is missing a multiplication by 0.01f. Specificall ...
Instance static mesh instances are reset to zero when moving actor between levels (via move actor to current level)
Tools - Nov 13, 2018When moving an instance static mesh between sublevels the number of instances being used will be set to zero. This happens when an empty actor is added to the level and then has an instance static m ...
MaterialX texture imports won't import files with the same name
UE - Editor - Content Pipeline - Import and Export - Apr 2, 2025Hello! When importing .mtlx files that contain textures with the same name (but different filepaths), only the first texture is imported. This seems to be due to the function CreateTextureNode() i ...
Deprecated: CharacterMovementComponent::bRequestedMoveUseAcceleration
UE - Gameplay - Player Movement - May 3, 2019Licensee has brought into question the difference between NavMovementComp::bUseAccelerationForPaths Vs. CharacterMovementComponent::bRequestedMoveUseAcceleration. This led to a discussion in a Supp ...
Getting Fullscreen or Windowed Resolutions doesn't fully execute on Linux
UE - Rendering Architecture - RHI - Oct 28, 2019When using "Get Supported Fullscreen Resolutions" on UE when built with Vulkan, no values are printed out. This is an issue with any platform that builds UE with -vulkan, not just Linux. In Engine ...
Regression: Cannot import Landscape Layer Weightmap along with Heightmap because of broken resolution check for tiled images.
UE - Graphics Tools - Terrain - Jan 30, 2025When working in the "Landscape" editor mode, in both the "New" and "Import" tools, it is possible to import a single heightmap, as well as a weightmap for each layer. Each of these maps can come fro ...
[CrashReport] UE4Editor_UnrealEd!FEdGraphUtilities::PostProcessPastedNodes() [edgraphutilities.cpp:138]
UE - Gameplay - Blueprint - Jan 24, 2017This Jira was created from CrashReports submitted by the public due to the high number of occurrences. Descriptions from users are provided below. Error message: Access violation - code c0000005 ( ...
RepNotify variables passed by reference to a function or macro that then change the value of the variable do not trigger the OnRep function on the Server
UE - Networking - Jul 1, 2015RepNotify variables passed by reference to a function or macro that then change the value of the variable do not trigger the OnRep function on the Server. This is inconsistent with the behavior with ...
Imported Materials Are Not Assigned To Correct Element Index Based Off Mat ID (3dsMax)
UE - Editor - Content Pipeline - Import and Export - Nov 17, 2016When importing a mesh with material IDs from 3dsMax they will get assigned to different element numbers than intended. This worked 4.13.2 Binary CL 3172292 Is Broken in 4.14 Binary CL 3195953 ...
Orientation setting does not respect user's settings on Android
UE - Platform - Mobile - Feb 25, 2019The Orientation setting in the editor for Android phones does not respect the user's settings. Despite "Auto-rotate" being turned off, the orientation of the UE4 app will change if it is set to do s ...