Unreal Engine Issues
Unreal Engine Issues
Vive / SteamVR locks to 45 fps and is "choppy" if 'Allow Reprojection' is enabled.
UE - Platform - XR - May 6, 2016I know the fps capping is part of reprojection (rendering the frame twice), but compared to PSVR, something feels "off" and "choppy". Is the view suppose to update between frames? It feels like it m ...
HTTP GET requests are much slower than a Python script by a factor of 15-20x
UE - Networking - Jul 25, 2016Based on user report, a HTTP Get request from UE4 is 15-20x slower than if using a Python Get request to get the same file. ...
[Interchange][FBX] Issue with asset name clashes after auto import
UE - Editor - Content Pipeline - Import and Export - Jan 22, 2025The mesh changes and the asset name stays the same while the two FBX are completly different: different filename, different mesh names in the FBX CF video for repro steps. https://forums.unreale ...
Can't PIE or Save: Editor gets into odd state when editing parameters.
Tools - Jul 20, 2016I've seen this happen in other areas of the editor as well: Data Table fields (floats) for example. Manually typing in numbers to fields seems less prone to this error; using spinners to drag value ...
Frame rate issues using Fixed Frame Rate and Matinee
Tools - Aug 10, 2016Frame rate issues using Fixed Frame Rate and Matinee. This could be similar to some issues involving "Force Fixed Frame Rate". ...
Memory leak after simulating in Editor with opened 'Editor Preferences' tab
Tools - May 7, 2020This can be repeated many times before the editor crashes without any messages and other programs with the video driver crashes too. Because out-of-memory. This is similar to [Link Removed]. This w ...
Stock "P_AssaultRifle_AMmo" and "P_Health" pickup particles from the Shooter Game Pack cause the editor viewport to stutter and hang repeatedly
UE - Graphics Features - Apr 10, 2018When placing "P_AssaultRifle_AMmo" and "P_Health" pickups into a level there seems to be some stuttering in 4.19 projects. ...
JsonObjectToUStruct removes _ClassName from input FJsonObject, breaking repeated deserialization
UE - Core - Systems - Mar 18, 2026FJsonObjectConverter::JsonObjectToUStruct removes _ClassName from nested JSON objects during deserialization. Removing Obj->RemoveField(ObjectClassNameKey) from ConvertScalarJsonValueToFPropertyWit ...
Event Trace Log prints node actions multiple times
UE - Gameplay - Blueprint - Jun 10, 2015If a blueprint has a breakpoint on a node and that node is utilized in PIE, the Event Trace in the Debug Log window will register each action taken by the blueprint multiple times. ...
character movement velocity negatively affected by framerate
UE - Gameplay - Oct 28, 2015Lower framerates directly affect the velocity of a character's movement if that velocity is provided by another source. ...