Unreal Engine Issues
Unreal Engine Issues
Events on frame 0 fire twice
UE - Anim - Sequencer - Jan 17, 2017Regression - does not occur in 4.13.2 or 4.14.3 Does occur in Dev-Sequencer ...
Material re-route nodes break TextureSample output
UE - Rendering Architecture - Materials - May 4, 2017This is a bug found by a licensee ...
Collision does not work on Static Mesh created from BSP
UE - Simulation - Physics - Jan 19, 2018After applying a Linear Stair brush to the editor and creating a Static Mesh from that brush, then setting its Collision Preset to BlockAll, the third person character is not able to walk up the sta ...
Assets Imported Using "Import Into Level" Scaling Does Not Match the Scale of Assets Imported Through the Content Browser
Tools - Apr 12, 2018Assets that are imported using File < Import to Level, import at a different scale than when importing through the Content Browser Screenshot attached to show difference in scale Meshes were both ...
Live Link Pose node silently fails in Standalone mode due to incorrect Module type
OLD - Anim - Jul 17, 2018LiveLinkEditor Module is flagged as "Editor" and not "Developer" causing the Anim Node "Live Link Pose" to silently fail in Standalone mode. The node works correctly in PIE and in packaged builds. ...
Navigation Mesh ignores Hierarchical Instanced Static Meshes using "Build Paths" or the "Build" Button
UE - AI - Feb 1, 2019Hierarchical Instanced Static Meshes are partially ignored after building the navigation mesh. This is causing the navmesh to be generated within all or part the HISM instead of around it. This ...
[AI] ZoneGraph does not automatically rebuild when Build ZoneGraph While Editing flag is enabled.
UE - AI - Feb 16, 2023ZoneGraph is failing to build automatically in the editor even when the flag for Build Zone Graph While Editing is enabled. Things tried that do not cause an automatic rebuild are:Moving, rotating, ...
Network Prediction crash when smoothing service instance data is reallocated out from under FNetworkPredictionStateView
UE - Gameplay - Network Prediction - Apr 4, 2025Received a report from a licensee using Network Prediction Plugin and Mover. There is a strong likelihood of a crash occurring when using NPP's smoothing option and spawning new NPP-simulating ins ...
Imported animation has one more frame than the original fbx
OLD - Anim - Jul 19, 2016In UE4.12, imported animation has one more frame than the expected frame number. AS_AN_StepAnim_Test.fbx is 60 frame long animation(starts at frame 0, ends at frame 60). When imported to UE4.12, it ...
Sampling Scene Texture in Custom Expression in Post Process Material Breaks Viewport UV
UE - Graphics Features - Apr 6, 2018This issue does not occur in 4.18.3 but does occur in 4.19 and Main, making this a regression. Per user: I suspect there's an issue with custom expressions and sampling coordinates. It appears onc ...